Hatsugai Yasuhiro


Hatsugai Yasuhiro

J-GLOBAL         Last updated: Nov 7, 2019 at 02:41
 
Avatar
Name
Hatsugai Yasuhiro
URL
http://rhodia.ph.tsukuba.ac.jp/~hatsugai
Affiliation
University of Tsukuba
Section
Faculty of Pure and Applied Sciences
Job title
Professor
Degree
PhD(The University of Tokyo)
ORCID ID
0000-0001-6933-5552

Academic & Professional Experience

 
Mar 1989
 - 
Mar 1995
Research Associate, I got this position as a research associate without finishing the PhD course. (PhD Applied Physics, 1990, Univ. of Tokyo. )
 
Oct 1992
 - 
Sep 1993
Post Doc, Massachusetts Institute of Technology (also research associate at Univ. of Tokyo)
 
Apr 1995
 - 
Sep 1996
Lecturer, University of Tokyo
 
Oct 1996
 - 
Mar 2007
Associate Professor, Department Applied Physics, University of Tokyo
 
Apr 2007
 - 
Sep 2011
Professor, Institute of Physics, University of Tsukuba
 
Oct 2011
   
 
Professor, Faculty of Pure and Applied Sciences, University of Tsukuba
 
Nov 2010
 - 
Mar 2012
Affiliate professor, Center for Interdisciplinary Research, Tohoku University
 
Apr 2010
 - 
Mar 2012
Dean, college of physics, University of Tsukuba
 
May 2014
 - 
Mar 2020
Tohoku University
 
Apr 2016
 - 
Mar 2018
Associate Provost, School of Science and Engineering, University of Tsukuba
 
Apr 2018
 - 
Mar 2020
Chair, Department of Physics, University of Tsukuba
 
Apr 2018
 - 
Mar 2020
Chair, Division of Physics, University of Tsukuba
 

Education

 
Apr 1981
 - 
Mar 1985
Applied Physics, Faculty of Engineering, The University of Tokyo
 
Apr 1985
 - 
Mar 1987
Department of Applied Physics, University of Tokyo
 
Apr 1987
 - 
Feb 1989
Applied Physics, Graduate School, Division of Engineering, The University of Tokyo
 

Committee Memberships

 
2008
 - 
2012
Edirorial Committees of the Progress of Theoretical Physics
 

Awards & Honors

 
Feb 2019
2018 BEST FACULTY MEMBER, Univ. Tsukuba
Winner: Yasuhiro Hatsugai
 
Apr 2018
The Commendation for Science and Technology (Research Category), the Minister of Education, Culture, Sports, Science and Technology
Winner: Yasuhiro Hatsugai
 
Feb 2016
2015 BEST FACULTY MEMBER, University of Tsukuba
Winner: Yasuhiro Hatsugai
 
Mar 2015
Chern Numbers in Discretized Brillouin Zone: Efficient Method of Computing (Spin) Hal", J. Phys. Soc. Jpn. 74, pp. 1674 (2005), Outstanding Paper Award of the Physical Society of Japan
Winner: Takahiro Fukui, Yasuhiro Hatsugai, and Hiroshi Suzuki 
 
The topological state of electrons in condensed matter is being focused on in theoretical physics to study the emergent properties of materials for future applications. An increasing number of researchers on this subject have begun using computer ...

Published Papers

 
Mizoguchi, Tomonari;Hatsugai, Yasuhiro
Europhysics Letters   127(4) 47001-p1-47001-p6   Sep 2019   [Refereed]
We develop a framework to describe a wide class of flat-band models, with and without a translational symmetry, by using "molecular orbitals" introduced in a prior work (Hatsugai Y. and Maruyama I., EPL, 95 (2011) 20003). Using the molecular-orbit...
Mizoguchi, Tomonari;Araki, Hiromu;Hatsugai, Yasuhiro
Journal of The Physical Society of Japan   88(10) 104703-1-104703-7   Sep 2019   [Refereed]
Higher-order topological insulators have attracted considerable interests as a novel topological phase of matter, where topologically non-trivial nature of bulk protects boundary states whose co-dimension is larger than one. It has been revealed t...
Fubasami, Shota;Mizoguchi, Tomonari;Hatsugai, Yasuhiro
Physical Review B   100(1) 014438-1-014438-7   Jul 2019   [Refereed]
On the basis of a Berry-phase analysis, we study the ground state of the J1−J2 Heisenberg chain for S=2,3,4. We find that changes in the Berry phase occur S times for spin-S systems, indicating sequential phase transitions. The sequential phase tr...
Kudo, Koji; Watanabe, Haruki; Kariyado, Toshikaze; Hatsugai, Yasuhiro
PHYSICAL REVIEW LETTERS   122(14)    Apr 2019   [Refereed]
Kawarabayashi, Tohru; Ishii, Kota; Hatsugai, Yasuhiro
Journal of the Physical Society of Japan   88(4)    Mar 2019   [Refereed]
Yoshida, Tsuneta;Peters, Robert;Kawakami, Norio;Hatsugai, Yasuhiro
Physical Review B(Rapid Communication)   99(12) 121101   Mar 2019   [Refereed]
Emergence of exceptional points in two dimensions is one of the remarkable phenomena in non-Hermitian systems. We here elucidate the impacts of symmetry on the non-Hermitian physics. Specifically, we analyze chiral symmetric correlated systems in ...
Araki, Hiromu;Mizoguchi, Tomonari;Hatsugai, Yasuhiro
Physical Review B   99(8) 085406-1-085406-8   Feb 2019
A higher-order topological insulator is a new concept of topological states of matter, which is characterized by the emergent boundary states whose dimensionality is lower by more than two compared with that of the bulk, and draws a considerable i...
Kawarabayashi, Tohru;Aoki, Hideo;Hatsugai, Yasuhiro
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS   256(6:::SI) 1800524   Jan 2019   [Refereed]
The doubling of massless Dirac fermions on two-dimensional lattices istheoretically studied. It has been shown that the doubling of massless Diracfermions on a lattice with broken chiral symmetry is topologically protectedeven when the Dirac cone ...
Kudo,Koji;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   72(0) 1064-1064   2017
Takahashi, Yuta;Kariyado, Toshikaze;Hatsugai, Yasuhiro
Phys. Rev. B   99(2) 024102   Jan 2019   [Refereed]
A spring-mass model arranged in a diamond structure—mechanical diamond—is analyzed in terms of topology in detail. We find that additional springs connecting the next-nearest-neighbor (NNN) pairs of mass points and the modulation of the mass param...
Takahashi, Shun;Oono, Shuhei;Iwamoto, Satoshi;Hatsugai, Yasuhiro;Arakawa, Yasuhiko
J. Phys. Soc. Jpn. (Lett.)   87(12) 123401   Dec 2018   [Refereed]
The polarizations of topological edge modes in the vicinity of optical Weyl points were numerically studied in chiral photonic crystals. We investigated two kinds of rotationally stacked woodpile structures in which planar rod arrays were vertical...
Fukui, Takahiro; Hatsugai, Yasuhiro
PHYSICAL REVIEW B   98(3) 035147   Jul 2018   [Refereed]
Kariyado, Toshikaze; Morimoto, Takahiro; Hatsugai, Yasuhiro
Physical review letters   120(24) 247202   Jun 2018   [Refereed]
We show that the Z_{N} Berry phase (Berry phase quantized into 2π/N) provides a useful tool to characterize symmetry protected topological phases with correlation that can be directly computed through numerics of a relatively small system size. Th...
Imura, K. -I.;Yoshimura, Y.;Fukui, T.;Hatsugai, Yasuhiro
Journal of Physics: Conf. Series   969 012133   2018   [Refereed]
Kudo,Koji;Hatsugai,Yasuhiro
Journal of the Physical Society of Japan   87(6) 063701   May 2018   [Refereed]
Fully taking into account the honeycomb lattice structure, Factional quantum Hall states of graphene are considered by a pseudopotential projected into the n = 0 Landau band. By using chirality as an internal degree of freedom, the Chern number ma...
Kudo, Koji; Kariyado, Toshikaze; Hatsugai, Yasuhiro
Journal of the Physical Society of Japan   86(10)    Oct 2017   [Refereed]
Araki, Hiromu; Fukui, Takahiro; Hatsugai, Yasuhiro
PHYSICAL REVIEW B   96(16)    Oct 2017   [Refereed]
Yoshimura,Yukinori;Imura,Ken;Hatsugai,Yasuhiro;Fukui,Takahiro
Meeting Abstracts of the Physical Society of Japan   72(0) 1409-1409   2017
<p>バルクエッジ対応はトポロジカル量子現象に共通の特徴的性質である.本講演では,量子ホール/トポロジカル絶縁体系の変形版であるトポロジカル量子ポンプ(TQP)系におけるバルクエッジ対応に焦点を当てる.TQP系については,最近,冷却原子系における実験が行なわれるようになり,注目を集めている.本講演では,Rice-Mele模型やHaldane模型等の具体的なモデルを用いた計算により,TQP系におけるバルクエッジ対応の役割を明らかにしたい.</p>
Kawarabayashi,Tohru;Aoki,Hideo;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   72(0) 2773-2773   2017
<p>通常のカイラル対称性を保存する格子模型のゼロモードは、staggered potentialによって対称性が破られても、エネルギーはゼロからずれるが、状態としては不変であり、その意味で安定性を持つ。こうした擬ゼロモードの安定性は、通常のカイラル対称性が破れている傾いたディラック電子系では自明ではない。今回、そうした場合に擬ゼロモードがどの様な安定性を示すのかについて、傾いたディラック電子を持ち、一般化されたカイラル対称性を厳密に保存する格子模型を用いて解析した結果について報告する。</p>
Takahashi,Yuta;Kariyado,Toshikaze;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   72(0) 3118-3118   2017
<p>前回はダイヤモンド格子状のバネ・質点モデルであるメカニカルダイヤモンドのエッジ状態についてカイラル対称性とトポロジカル不変量の観点から議論を行った。そして今回はさらに状況を発展させてバネ定数を変えた場合、エッジの形状を変えた場合等にエッジ状態がどう変化するかをトポロジカルな観点から議論する予定である。</p>
Oono,S.;Takahashi,S.;Iwamoto,S.;Hatsugai,Y.;Arakawa,Y.
Meeting Abstracts of the Physical Society of Japan   72(0) 1430-1430   2017
<p>格子状に周期配列された誘電体からなる層を回転させながら積層することで、カイラルな三次元フォトニック結晶が構成される。本研究では数値計算によって、この構造におけるトポロジカルなエッジモードを見出した。これは、三次元波数空間での特異点であるワイル点の存在を反映したもので、チャーン数と関係づけられる。本構造は、ナノスケールでの作製が可能であるため、近赤外域でのエッジモードの観測が期待できる。</p>
Kudo,Koji;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   72(0) 1401-1401   2017
<p>ハニカム格子やカゴメ格子などに対して,磁場下の一電子状態を用いた擬ポテンシャルの厳密対角化により,ラフリン状態ならびに偶数分母状態等を対象にその安定性等を議論した結果を報告する。</p>
Takahashi, Yuta;Kariyado, Toshikaze;Hatsugai, Yasuhiro
NEW JOURNAL OF PHYSICS   19    Mar 2017   [Refereed]
Hattori, Ayami;S., Tanaya;K., Yada;M., Araidai;M., Sato;Hatsugai, Yasuhiro;K., Shiraishi;Y., Tanaka
Journal of Physics: Condensed Matter   29(11) 115302   Feb 2017   [Refereed]
We investigate the energy dispersion of the edge states in zigzag silicene, germanene and stanene nanoribbons with and without hydrogen termination based on a multi-orbital tight-binding model. Since the low buckled structures are crucial for thes...
Tohru, Kawarabayashi;Hideo, Aoki;Hatsugai, Yasuhiro
PHYSICAL REVIEW B   94(23) 235307   Dec 2016   [Refereed]
While it has been pointed out that the chiral symmetry, which is important for the Dirac fermions in graphene, can be generalized to tilted Dirac fermions as in organic metals, such a generalized symmetry was so far defined only for a continuous l...
Oono, Shuhei;Kariyado, Toshikaze;Hatsugai, Yasuhiro
PHYSICAL REVIEW B   94(12)    Sep 2016   [Refereed]
Fukui, Takahiro; Hatsugai, Yasuhiro
Journal of the Physical Society of Japan   85(8) 1-4   Aug 2016   [Refereed]
Hatsugai, Y.;Fukui, T.
PHYSICAL REVIEW B   94(4)    Jul 2016   [Refereed]
Kawarabayashi,Tohru;Aoki,Hideo;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   71(0) 1656-1656   2016
<p>有機導体などに見られる傾いたディラック電子系に対して、ゼロモードを保ったまま代数的な連続変形を行うことにより、グラフェンに見られるような、カイラル対称な垂直なディラック電子系へと変形できる場合があることを示す。講演では、前回の学会で報告できなかった、連続変形の一般論(変形の一般性、時間反転対称性との関係など)とともに議論したい。</p>
Itagaki,Ryo;Hatsugai,Yasuhiro;Aoki,Hideo;Kawarabayashi,Tohru
Meeting Abstracts of the Physical Society of Japan   71(0) 2957-2957   2016
<p>これまで、グラフェンなどのディラック電子系のケクレ型のボンド秩序のvortexに付随するゼロモードに対する研究は行われてきたが、staggered potentialによって発現する非分数電荷の数値研究は渦度が最低のものに限られていた。今回、我々は格子模型に対して高次の渦度を持つvortexを直接構成し、Kernel polynomial法を用いて、非分数電荷を数値的に求め、有効理論との比較、ランダムネスに対する安定性について調べた。</p>
Takahashi,Yuta;Kariyado,Toshikaze;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   71(0) 2958-2958   2016
<p>トポロジカル相の基本原理としてのバルク・エッジ対応はその適用範囲を量子系に限らず、古典力学系でも成立することが近年明らかとなった。蜂の巣格子上のバネ・質点モデルであるメカニカルグラフェンがその典型例である。今回はこのメカニカルグラフェンの多様なエッジ状態をトポロジカルな観点から詳細に議論するとともに、3次元へ拡張した結果も報告する予定である。</p>
Kudo,Koji;Kariyado,Toshikaze;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   71(0) 1038-1038   2016
<p>カゴメ格子に磁場を加え、多電子系の電子間相互作用を最低エネルギーのランダウ準位が作る部分空間に射影した。バンドの占有率を分数にした上で相互作用の厳密対角化を行い、基底状態を求めた。特に奇数分母では、トポロジカル縮退を伴った基底状態、すなわち分数量子ホール状態が得られた。また偶数分母で得られた結果の検討も行った。今回の発表では、これらの内容を計算手法も含めて発表する。</p>
Oono,Shuhei;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   71(0) 1289-1289   2016
<p>本研究では、外場の影響によって、古典的電磁場の光学定数が時間変化する系での電磁場の時間発展を数値的手法を用いて解析した。講演では、特にその様な時間変化によって作り出される、トポロジカルに非自明なバルクギャップ中に現れるエッジモードの振る舞いについて報告する。</p>
Fukui,Takahiro;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   71(0) 2956-2956   2016
<p>近年、冷却原子系において実現されたトポロジカル電荷ポンプが注目を集めている。次のステップとして近々実現が期待されるポンプとしてスピン・ポンプがあげられる。しかし、本当に時間反転対称性に護られたZ2スピンポンプは、スピン軌道結合を実験的に作り出すことが困難である。我々は、もっと簡単に実現できるスピンポンプを提案する。時間反転対称性を破るため、Z2ポンプではないが、代わりにエンタングルメント・チャーン数という我々が提唱した新しいトポロジカル数で特徴付けられるスピンポンプである。この系の性...
Kohda,Keisuke;Hatsugai,Yasuhiro
Meeting Abstracts of the Physical Society of Japan   72(0) 2772-2772   2017
<p>カゴメ格子など種々の平坦バンドをもつ系にランダムネスを導入した際にあらわれる臨界的な波動関数にマルチフラクタル解析を行った結果を報告する。特に系の平坦バンドに関してその固有な振る舞いに着目した議論を行う。</p>
Kariyado,Toshikaze;Hatsugai,Yasuhiro
Journal of the Physical Society of Japan   85(4) 043001-1-043001-4   Mar 2016   [Refereed]
The topological way of thinking now goes beyond quantum solids, and topological characters of classical mechanical systems obeying Newton's law are attracting current interest. To provide a physical insight into the topological numbers in mechanic...
Araki,Hiromu;Kariyado,Toshikaze;Fukui,Takahiro;Hatsugai,Yasuhiro
Journal of the Physical Society of Japan   85(4) 043706-1-043706-4   Mar 2016   [Refereed]
The entanglement Chern number, the Chern number for the entanglement Hamiltonian, is used to characterize the Kane-Mele model, which is a typical model of the quantum spin Hall phase with time-reversal symmetry. We first obtain the global phase di...
T.,Kariyado;Y.,Hatsugai
Scientific Reports   5 18107   Dec 2015   [Refereed]
Mechanical graphene, which is a spring-mass model with the honeycomb structure, is investigated. The vibration spectrum is dramatically changed by controlling only one parameter, spring tension at equilibrium. In the spectrum, there always exist D...
18aAG-2 Hannay angle as a topological order parameter for classical systems
Kariyado,Toshikaze;Hatsugai,Yasuhiro
日本物理学会講演概要集   70(2) 1085   Sep 2015
19aCR-2 Local density of states at the vortex of bond ordering in 2D Dirac fermions
Itagaki,R.;Hatsugai,Y.;Aoki,H.;Kawarabayashi,T.
日本物理学会講演概要集   70(2) 2817   Sep 2015
19aCR-7 A spin pump characterised by entanglement Chern numbers
Fukui,T.;Hatsugai,Y.
日本物理学会講演概要集   70(2) 2821   Sep 2015
16aCE-5 Section Chern number and edge states in the 3D photonic crystal without inversion symmetry
Oono,Shuhei;Kariyado,Toshikaze;Hatsugai,Yasuhiro
日本物理学会講演概要集   70(2) 1146   Sep 2015
Toshikaze,Kariyado;Yasuhiro,Hatsugai
PHYSICAL REVIEW B   91(21) 214410   Jun 2015   [Refereed]
Topological properties of the spin-1/2 dimerized Heisenberg ladder are investigated, focusing on the plateau phase in the magnetic field whose magnetization is half of the saturation value. Although the applied magnetic field removes most of the s...
Takahiro,Fukui;Yasuhiro,Hatsugai
Journal of the Physical Society of Japan   84(4) 043703   Apr 2015   [Refereed]
We argue that the entanglement Chern number proposed recently is invariant under the adiabatic deformation of a gapped many-body groundstate into a <italic>disentangled</italic>/<italic>purified</italic>one, which implies a partition of the Chern ...
23pAB-11 Electronic structure of silicene in the extended Weaire-Thorpe model : Flat bands and Dirac cones
Hatsugai,Y.;Shiraishi,K.;Aoki,H.
日本物理学会講演概要集   70(1) 1354   Mar 2015
22pAC-1 Variety of zero-energy edge states in graphene flakes
Seki,Daichi;Kariyado,Toshikaze;Hatsugai,Yasuhiro
日本物理学会講演概要集   70(1) 1845   Mar 2015
Yasuhiro,Hatsugai;Tohru,Kawarabayashi;Hideo,Aoki
PHYSICAL REVIEW B   91(8) 085112   Feb 2015   [Refereed]
An anomalously sharp (-function-like) Landau level in the presence of disorder is usually considered to be a manifestation of the massless Dirac fermions in magnetic fields. This property persists even when the Dirac cone is tilted, which has bee...
Y.,Hatsugai;K.,Shiraishi;H.,Aoki
NEW JOURNAL OF PHYSICS   17 025009   Feb 2015   [Refereed]
白石賢二;初貝,安弘
Journal of the Vacuum Society of Japan   57(11) 423-427   Nov 2014   [Refereed]
  Silicene is a two dimensional material of silicon and has zero-gap semiconductor characteristics as is garaphene, where nnergy dispersion reveals Dirac-Fermion nature.<br>   Moreover, silicene is expected to be very sensitive to electric field d...
Takahiro,Fukui;Yasuhiro,Hatsugai
Journal of the Physical Society of Japan   83(11) 113705   Nov 2014   [Refereed]
If an extensive partition in two dimensions yields a gapful entanglement spectrum of the reduced density matrix, the Berry curvature based on the corresponding entanglement eigenfunction defines the Chern number. We propose such an entanglement Ch...
Yukinori,Yoshimura;Ken-Ichiro,Imura;Takahiro,Fukui;Yasuhiro,Hatsugai
PHYSICAL REVIEW B   90(15) 155443   Oct 2014   [Refereed]
We propose classification schemes for characterizing two-dimensional topological phases with nontrivial weak indices. Here, weak implies that the Chern number in the corresponding phase is trivial, while the system shows edge states along specific...
9pAQ-5 Fractionally Quantized Berry Phase and Bulk-edge Correspondence in quantum Spin Systems
Kariyado,Toshikaze;Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   69(2) 168   Aug 2014
7pAD-6 Chern numbers and edge states in photonic crystals
Oono,Shuhei;Kariyado,Toshikaze;Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   69(2) 504   Aug 2014
9aAQ-8 Robust n=0 Landau levels for tilted Dirac fermions with staggered potential
Kawarabayashi,T.;Hatsugai,Y.;Aoki,H.
Meeting abstracts of the Physical Society of Japan   69(2) 158   Aug 2014
9aAQ-12 Quantization of Berry's phase for non-chiral systems
Hukui,T.;Hatsugai,Y.
Meeting abstracts of the Physical Society of Japan   69(2) 158   Aug 2014
8aAV-2 Theoretical Study of Electron Transportation in Nanoscale Channel
Fujita,G.;Shiokawa,T.;Takada,Y.;Konabe,S.;Muraguchi,M.;Yamamoto,T.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Meeting abstracts of the Physical Society of Japan   69(2) 473   Aug 2014
Toshikaze,Kariyado;Yasuhiro,Hatsugai
PHYSICAL REVIEW B   90(8) 085132   Aug 2014   [Refereed]
Symmetry protected quantization of the Berry phase is discussed in relation to edge states. Assuming an existence of some adiabatic process which protects quantization of the Berry phase, non trivial Berry phase ( is a local filling of particles)...
Aoki,Hideo;Hatsugai,Yasuhiro
PHYSICAL REVIEW B   90(4) 045206   Jul 2014   [Refereed]
Graphene, with its quantum Hall topological (Chern) number reflecting the massless Dirac particle, is shown to harbor yet another topological quantum number. This is obtained by combining Streda's general formula for the polarization associated wi...
Theoretical Study of Electron Transportation in Nanoscale Channel
Fujita,G.;Shiokawa,T.;Takada,Y.;Konabe,S.;Muraguchi,M.;Yamamoto,T.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Technical report of IEICE. SDM   114(88) 55-58   Jun 2014
We calculate electron transportation of quantum-classical crossover region in the Nano scale channel by using "multi-electron wave packet" picture. Especially, we study the effect of long-range Coulomb interaction and external electric field by so...
Hiroki,Sakamoto;Yasuhiro,Hatsugai;Hideo,Aoki;Tohru,Kawarabayashi
JPS Conf. Proc.   1 012069   Mar 2014   [Refereed]
Stability of the zero-energy Landau levels in trilayer graphene is theoretically investigated for both ABA and ABC stackings with a tight-binding model that incorporates a bond disorder. The zero-energy Landau level is shown to exhibit an anomalou...
Toshikaze,Kariyado;Yasuhiro,Hatsugai
JPS Conf. Proc.   1 012001   Mar 2014   [Refereed]
Electronic structure of fermionic Shastry–Sutherland model, which is recently revealed to have a rich phase diagram, is investigated further in detail. We find that if the spin–orbit coupling exists, the quantum spin Hall insulator phase is also p...
Daichi,Seki;Yuji,Hamamoto;Yasuhiro,Hatsugai
JPS Conf. Proc.   1 012068   Mar 2014   [Refereed]
The dimer structure in graphene flakes has been recently studied by means of the Z2 Berry phase. The Berry phase acts as a local order parameter for a strong bond and predicts dimers appear on armchair edges of graphene flakes. We here discuss the...
Tosikaze,Kariyado;Hatsugai,Yasuhiro
PHYSICAL REVIEW B   88(24) 245126   Dec 2013   [Refereed]
The fermionic Shastry-Sutherland model has a rich phase diagram, including phases with massless Dirac fermions, a quadratic band crossing point, and a pseudospin-1 Weyl fermion. Berry phases defined by the one-dimensional momentum as a parameter a...
T.,Kawarabayashi;T.,Honda;H.,Aoki;Y.,Hatsugai
AIP Conf. Proc.   1566 283   Dec 2013   [Refereed]
The effect of disorder on the Landau levels of massless Dirac fermions is examined for the cases with and without the fermion doubling. To tune the doubling a tight-binding model having a complex transfer integral is adopted to shift the energies ...
Hamamoto,Yuji;Tohru,Kawarabayashi;Hideo,Aoki;Yasuhiro,Hatsugai
PHYSICAL REVIEW B   88(19) 195141   Nov 2013   [Refereed]
Motivated by the recent experiments indicating a spin-unpolarized \nu=0 quantum Hall state in graphene, we theoretically investigate the ground state based on the many-body problem projected onto the n=0 Landau level. For an effective model with t...
T.,Kawarabayashi;Y.,Hatsugai;H.,Aoki
Journal of Physics: Conference Series   456 012020   Aug 2013   [Refereed]
The stability of the zero-energy Landau levels in bilayer graphene against the chiral symmetric disorder is examined in the presence of the trigonal warping. Based on the tight-binding lattice model with a bond disorder correlated over several lat...
Y.,Hamamoto;T.,Kawarabayashi;H.,Aoki;Y.,Hatsugai
Journal of Physics: Conference Series   456 012013   Aug 2013   [Refereed]
Influence of the chiral symmetry on the many-body problem in multilayer graphene in magnetic fields is investigated. For a spinless electron model on the honeycomb lattice the many-body ground state is shown to be a doubly-degenerate chiral conden...
T.,Fukui;K.-I.,Imura;Hatsugai,Yasuhiro
Journal of the Physical Society of Japan   82(7) 073708-073708-5   Jul 2013   [Refereed]
We explore novel topological phases realized in a superlattice system based on the Wilson-Dirac model. Our main focus is on a two-dimensional analogue of the weak topological insulator phases. We find such phases as are characterized by gapless ed...
Taro,Shiokawa;Genki,Fujita;Yukihiro,Takada;Satoru,Konabe;Masakazu,Muraguchi;Takahiro,Yamamoto;Tetsuo,Endoh;Yasuhiro,Hatsugai;Shiraishi,Kenji
JAPANESE JOURNAL OF APPLIED PHYSICS   52(4) 04CJ06-04CJ06-4   Apr 2013   [Refereed]
Influence of Coulomb blockade on electron scattering by a quantum dot has been theoretically investigated using a multielectron wave packet simulation technique based on the time-dependent Hartree--Fock approximation. In our simulation, the bound ...
26pXJ-9 Spin-unpolarized chiral condensates in graphene in magnetic fields
Hamamoto,Yuji;Kawarabayashi,Tohru;Aoki,Hideo;Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   68(1) 753   Mar 2013
28pXP-7 Semictlassical Klein tunneling with Berry phase corrections in graphene
Puetter,Christoph M.;Konabe,S.;Hatsugai,Yasuhiro;Shiraishi,Kenji
Meeting abstracts of the Physical Society of Japan   68(1) 772   Mar 2013
26dXQ-3 Effect of Coulomb Interactions between Electrons in the Multielectron Wave Packet Dynamics with Spin Degrees of Freedom
Fujita,G.;Shiokawa,T.;Takada,Y.;Konabe,S.;Muraguchi,M.;Yamamoto,T.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Meeting abstracts of the Physical Society of Japan   68(1) 754   Mar 2013
26aXT-1 Chern Number of Twisted Bilayer Graphene
Sumi,Risa;Hamamoto,Yuji;Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   68(1) 744   Mar 2013
Hatsugai, Y.;Morimoto, T.;Kawarabayashi, T.;Hamamoto, Y.;Aoki, H.
NEW JOURNAL OF PHYSICS   15    Mar 2013   [Refereed]
26pXQ-4 Effect of Coulomb Interactions on the Multielectron Wave Packet Dynamics of Circular Current
Shiokawa,T.;Fujita,G.;Takada,Y.;Konabe,S.;Muraguchi,M.;Yamamoto,T.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Meeting abstracts of the Physical Society of Japan   68(1) 754   Mar 2013
27aXJ-10 Edge states of graphene and silicene ribbons based on a multi-orbital tight-binding model
Tanaya,Sho;Hamamoto,Yuji;Konabe,Satoru;Shiraishi,Kenji;Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   68(1) 925   Mar 2013
26pXJ-4 Robust zero-mode Landau levels of graphene with the Kekure bond order
Kawarabayashi,T.;Hatsugai,Y.;Aoki,H.
Meeting abstracts of the Physical Society of Japan   68(1) 752   Mar 2013
Topological order and Berry connections
初貝安弘
日本物理学会会誌   68(1) 19-28   Jan 2013   [Refereed]
Characterization of quatum/spin liquids without any fundamental symmetry breaking is one of the focuses of modern condensed matter physics. Quantum Hall states, the Haldane spin chains and the topological insulators are typical examples. They are ...
Semiclassical Klein Tunneling with Berry Phase Corrections in Graphene
Christoph., M. Puetter;Satoru, Konabe;Yasuhiro, Hatsugai;Kenji, Shiraishi
arXiv:1211.0150      Nov 2012
Hamamoto, Yuji;Aoki, Hideo;Hatsugai, Yasuhiro
PHYSICAL REVIEW B   86(20)    Nov 2012
Many-body effects and edge states in bilayer graphene in magnetic fields
Hamamoto,Yuji;Kawarabayashi,Tohru;Aoki,Hideo;Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   67(2) 611   Aug 2012
Topologically protected zero modes in bilayer graphene in magnetic fields : effect of trigonal warping
Kawarabayashi,T.;Hatsugai,Y.;Aoki,H.
Meeting abstracts of the Physical Society of Japan   67(2) 611   Aug 2012
Orbital Magnetization in Periodic System
Arai,M.;Hatsugai,Y.
Meeting abstracts of the Physical Society of Japan   67(2) 223   Aug 2012
Wave Packet Dynamics in One-Dimensional Nonuniform Potential
Shiokawa,T.;Fujita,G.;Takada,Y.;Konabe,S.;Muraguchi,M.;Yamamoto,T.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Meeting abstracts of the Physical Society of Japan   67(2) 653   Aug 2012
The Effect of the Interaction between Electrons in the Multi-Electron Wave Packet Dynamics in Nano Structure
Fujita,G.;Shiokawa,T.;Takada,Y.;Konabe,S.;Muraguchi,M.;Yamamoto,T.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Meeting abstracts of the Physical Society of Japan   67(2) 652   Aug 2012
Entanglement and Berry connection
Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   67(2) 275   Aug 2012
Kawarabayashi, Tohru;Hatsugai, Yasuhiro;Aoki, Hideo
PHYSICAL REVIEW B   85(16)    Apr 2012   [Refereed]
Arikawa, Mitsuhiro;Hatsugai, Yasuhiro;Endoh, Tetsuo;Shiraishi, Kenji
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   81(4) 44706-044706-4   Apr 2012   [Refereed]
Application of the Z_Q Berry phase for short-range entangled states
Hatsugai,Y.;Maruyama,I.
Meeting abstracts of the Physical Society of Japan   67(1) 383   Mar 2012
Applied electric field dependence of the wave packets dynsmics in the semiconductor nanostructure
Shiokawa,T.;Takada,Y.;Yoon,Y. T.;Iwata,J. I.;Konabe,S.;Arikawa,M.;Muraguchi,M.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Meeting abstracts of the Physical Society of Japan   67(1) 757   Mar 2012
Localized many-body states of graphene in magnetic fields
Hamamoto,Yuji;Aoki,Hideo;Hatsugai,Yasuhiro
Meeting abstracts of the Physical Society of Japan   67(1) 730   Mar 2012
Topologically protected Landau levelo in bilayer graphene with finite electric fields
Kawarabayashi,T.;Hatsugai,Y.;Aoki,H.
Meeting abstracts of the Physical Society of Japan   67(1) 730   Mar 2012
Effect of disorder on Landau levels of Dirac electrons without fermion doubling
Honda,T.;Hatsugai,Y.;Aoki,H.;Kawarabayashi,T.
Meeting abstracts of the Physical Society of Japan   67(1) 385   Mar 2012
Quantized Berry phase and crossed-dimer phase in a 2D pyrochlore lattice
Tanaya,S.;Maruyama,I.;Hatsugai,Y.
Meeting abstracts of the Physical Society of Japan   67(1) 351   Mar 2012
Theoretical study of wave packet dynamics in two-dimensional semiconductor nano-stuructures
Takada,Y.;Yoon,Y. T.;Shiokawa,T.;Iwata,J. I.;Konabe,S.;Arikawa,M.;Muraguchi,M.;Endoh,T.;Hatsugai,Y.;Shiraishi,K.
Meeting abstracts of the Physical Society of Japan   67(1) 747   Mar 2012
Takada, Yukihiro;Yoon, Young Taek;Shiokawa, Taro;Konabe, Satoru;Arikawa, Mitsuhiro;Muraguchi, Masakazu;Endoh, Tetsuo;Hatsugai, Yasuhiro;Shiraishi, Kenji
JAPANESE JOURNAL OF APPLIED PHYSICS   51(2:Part 2)    Feb 2012
Arikawa, Mitsuhiro;Muraguchi, Masakazu;Hatsugai, Yasuhiro;Shiraishi, Kenji;Endoh, Tetsuo
JAPANESE JOURNAL OF APPLIED PHYSICS   51(2:Part 2)    Feb 2012   [Refereed]
グラフェンの特異な物性とカイラル対称性(基研研究会「熱場の量子論とその応用」,研究会報告)
初貝, 安弘
Soryushiron Kenkyu   119(4) F20-F25   Feb 2012   [Refereed]
Wave packet dynamics in the spin torque transfer
M., Arikawa;Y., Hatsugai;T., Endoh;K., Shiraishi
J. Phys. Soc. Jpn.   81 044706 (4)   Jan 2012   [Refereed]
Generalization of chiral symmetry for tilted Dirac cones
T., Kawarabayashi;Y., Hatsugai;T., Morimoto;H., Aoki
Int. J. Mod. Phys. : Conf. Ser.   11 145-150   Jan 2012   [Refereed]

Books etc

 
科研費NEWS
初貝, 安弘 (Part:Contributor, トポロジカル物質におけるバルク・エッジ対応)
日本学術振興会   2017   
数理科学
初貝, 安弘 (Part:Contributor, 特集:「物理学と数学のつながり」物理学と線形代数」~量子力学での展開~)
サイエンス社   May 2017   
パリティ
初貝, 安弘 (Part:Contributor, 特集:トポロジーによる新しい物性物理「物質内部と表面状態の深い関係:バルクエッジ対応」)
丸善   2017   
パリティ
初貝, 安弘 (Part:Contributor, コラム:メイドインジャパン物理用語 物性編「TKNN数」)
丸善   2017   
数学セミナー
初貝, 安弘 (Part:Contributor, 2016年ノーベル物理学賞について/物質中に普遍的に存在するトポロジカルな構造)
日本評論社   Apr 2017   

Conference Activities & Talks

 
非可換ゲージ場中のディラック粒子系におけるn=0ランダウ準位のランダムネス対する安定性
藤澤周平;初貝安弘;河原林透
日本物理学会第74回年次大会   14 Mar 2019   日本物理学会
カゴメ格子上の高次トポロジカル絶縁体における電子相関
工藤耕司;吉田恒也;初貝安弘
日本物理学会第74回年次大会   14 Mar 2019   日本物理学会
機械学習による乱れたカゴメ高次トポロジカル絶縁体の相の決定
荒木広夢;溝口, 知成;初貝安弘
日本物理学会第74回年次大会   14 Mar 2019   日本物理学会
One-plaquette Chern number: Many-body Chern number without integration
Kudo, Koji;Watanabe, Haruki;Kariyado, Toshikaze;Hatsugai, Yasuhiro
APS March Meeting 2019   4 Mar 2019   
Detection of higher order topological phase in a disordered breathing Kagome model by using machine learning
Araki, Hiromu;Mizoguchi, Tomonari;Hatsugai, Yasuhiro
APS March Meeting 2019   4 Mar 2019   
Symmetry-protected exceptional rings in two-dimensional correlated systems with chiral symmetry
Tsuneya, Yoshida;Peters, Robert;Kawakami, Norio;Hatsugai, Yasuhiro
APS March Meeting 2019   4 Mar 2019   
Variety of bulk-edge correspondence
初貝,安弘
Topological Materials Science, The 4-th Annual Meeting   22 Jan 2019   
Topological phases to bulk-edge correspondence [Invited]
Hatsugai,Yasuhiro
NTT BRL Seminar   15 Jan 2019   Masaya Notomi 
Welcome ! : Bulk-edge correspondence in topological phases
Hatsugai,Yasuhiro
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018X)   9 Dec 2018   University of Tsukuba
Potential applications of topological phases [Invited]
Hatsugai,Yasuhiro
JSPS/EPSRC C2C meeting 2018   29 Oct 2018   
Corner states of Kagome lattice & related
Yasuhiro, Hatsugai
Trends in Theory of Correlated Materials (TTCM2018)   8 Oct 2018   
格子上の傾いたディラック電子のダブリングと一般化されたカイラル対称性
河原林透;青木秀夫;初貝, 安弘
日本物理学会2018年秋季大会   9 Sep 2018   日本物理学会
カゴメ格子上のコーナー状態とベリー位相
荒木広夢;初貝, 安弘
日本物理学会2018年秋季大会   9 Sep 2018   日本物理学会
トポロジカル四重極相へのエンタングルメント・ベリー位相の応用
福井隆裕;初貝, 安弘
日本物理学会2018年秋季大会   9 Sep 2018   日本物理学会
多体チャーン数の収束性について
工藤耕司;渡辺悠樹;苅宿俊風;初貝, 安弘
日本物理学会2018年秋季大会   9 Sep 2018   日本物理学会
Bulk-edge corresponding revisited [Invited]
Hatsugai, Yasuhiro
Recent progress in mathematics of topological insulators   3 Sep 2018   Institute for Theoretical Physics of ETH Zürich
Bulk-edge corresponding : another look at [Invited]
Hatsugai, Yasuhiro
Progress in the mathematics of topological states of matter (WPI-AIMR, Tohoku University)   13 Aug 2018   WPI-AIMR
Berry connection and bulk-edge correspondence in topological phases [Invited]
初貝, 安弘
Waseda University seminar   27 Jul 2018   
Short-range entangled states and bulk-edge correspondence: Symmetry protection and ZN Berry phases [Invited]
初貝,安弘
Kyushu University seminar   18 Jul 2018   
Topological order parameters of J1-J2 Heisenberg chains of S=1,2 and 3
Shota, Fubasami;Hatsugai, Yasuhiro
International Conference on Magnetism 2018 (ICM2018)   15 Jul 2018   
Topologically protected Doubling of Tilted Dirac Fermions in Two Dimensions
Kawarabayashi, Tohru;Aoki, Hideo;Hatsugai, Yasuhiro
34-th international conference on the physics of semiconductors (ICPS 2018)   29 Jul 2018   
Topological phase of the strained HgTe from the entanglement Hamiltonians and the First-principles calculations
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
23rd International Conference on High Magnetic Fields in Semiconductor Physics (HMF-23)   22 Jul 2018   
Halperin 331 state of the FQH system of the n=0 Landau band of graphene
Kudo, K.;Hatsugai, Yasuhiro
23rd International Conference on High Magnetic Fields in Semiconductor Physics (HMF-23)   22 Jul 2018   
Topological order in quantum phases in anisotropic Kagome magnets
Kawarabayashi, T.;Hatsugai, Yasuhiro
23rd International Conference on High Magnetic Fields in Semiconductor Physics (HMF-23)   22 Jul 2018   
Bulk-edge correspondence & short range entangled states revisited
Hatsugai,Yasuhiro
Third informal workshop ”Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts”   19 May 2018   
カゴメ古典スピン液体における境界の効果
溝口, 知成;初貝安弘
日本物理学会2018年秋季大会   9 Sep 2018   
フラットバンド模型の「分子軌道」による表現とその応用
溝口, 知成;宇田川将文;初貝安弘
日本物理学会第74回年次大会   14 Mar 2019   日本物理学会
Bulk-boundary correspondence in a kagome classical spin liquid
溝口, 知成;Yasuhiro, Hatsugai
Trends in Theory of Correlated Materials (TTCM2018)   8 Oct 2018   
Effects of boundary on a kagome Ising model with magnetic-charge interaction
Mizoguchi, Tomonari;Hatsugai, Yasuhiro
APS March Meeting 2019   4 Mar 2019   
カゴメ格子上の異方的XXZスピン系における量子相とベリー位相
河原林, 透;石井, 航太;初貝, 安弘
日本物理学会第73回年次大会   22 Mar 2018   
Chern行列によるグラフェンの分数量子ホール相の特徴付け
工藤, 耕司;初貝, 安弘
日本物理学会第73回年次大会   22 Mar 2018   
J1-J2整数スピン鎖における逐次量子相転移のZ2ベリー位相による特徴づけ
文挟, 彰太;初貝, 安弘
日本物理学会第73回年次大会   22 Mar 2018   
第一原理計算に基づくエンタングルメントハミルトニアンによるトポロジカル絶縁体の分類
荒木, 広夢;福井, 隆裕;初貝, 安弘
日本物理学会第73回年次大会   22 Mar 2018   
New Paradigm of Topological Materials [Invited]
Hatsugai,Yasuhiro
2018 Joint Symposium on Energy Materials Science and Technology   8 Mar 2018   
Weyl Points of the Entanglement Spectrum for Topological Insulators from First Principles
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
APS March Meeting 2018   5 Mar 2018   
Chern matrices associated with chiral basis for FQH system in graphene
Koji, K.;Hatsugai, Yasuhiro
APS March Meeting 2018   5 Mar 2018   
Device design and new functions based on bulk-edge correspondence [Invited]
初貝,安弘
Pre-Strategic Initiatives: Strategic Development Center of Next generation Material & Device workshop   16 Jan 2018   
Weyl points and edge states of mechanical diamond
Takahashi, Yuta;Hatsugai, Yasuhiro
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018)   4 Jan 2018   
Section entanglement Chern number for Bi and Sb based on first principles calculations
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018)   4 Jan 2018   
ZN Berry phase as a topological index for correlated systems: application to SU(N)
Kariyado, T.;Morimoto, T.;Hatsugai, Yasuhiro
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018)   4 Jan 2018   
Chern matrices associated with chiral basis for FQH system in graphene
Koji, K.;Hatsugai, Yasuhiro
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018)   4 Jan 2018   
Sequential topological transitions of J1-J2 integer spin chain characterized by Z2
Fubasami, S.;Hatsugai, Yasuhiro
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018)   4 Jan 2018   
Welcome! Bulk edge correspondence : quamtum Hall effects to mechanics
Hatsugai, Yasuhiro
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018)   4 Jan 2018   
The fractional quantum hall effect and chirality on honeycomb lattice
Kudo, K.;Hatsugai, Yasuhiro
Novel Quantum States in Condensed Matter 2017 (NQS2017)   30 Oct 2017   
Section entanglement Chern number for strong and weak topological insulators
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
Novel Quantum States in Condensed Matter 2017 (NQS2017)   30 Oct 2017   
Section entanglement Chern number for the Fu-Kane-Mele model and the Wilson-Dirac model
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
Trends in Theory of Correlated Materials (TTCM2017)   10 Oct 2017   Japan Society for the promotion of science (JSPS) Bilateral Joint Research Seminar FY2017
Welcome speech
Hatsugai,Yasuhiro
Trends in Theory of Correlated Materials (TTCM2017)   10 Oct 2017   Japan Society for the promotion of science (JSPS) Bilateral Joint Research Seminar FY2017
フラットバンド格子模型におけるディラック電子系の代数的変形
河原林, 透;青木, 秀夫;初貝, 安弘
JPS 2017 Fall meeting   21 Sep 2017   
メカニカルダイヤモンドのワイル点とエッジ状態
髙橋, 雄太;苅宿, 俊風;初貝, 安弘
JPS 2017 Fall meeting   21 Sep 2017   
3次元トポロジカル絶縁体相のエンタングルメント・ハミルトニアンによる特徴付け
荒木, 広夢;福井, 隆裕;初貝, 安弘
JPS 2017 Fall meeting   21 Sep 2017   
カゴメ格子の平坦バンドにおける電子間相互作用
工藤, 耕司;初貝, 安弘
JPS 2017 Fall meeting   21 Sep 2017   
ウッドパイル型カイラルフォトニック結晶における構造変形とバルク・エッジ対応
大野, 修平;髙橋, 駿;岩本, 敏;初貝, 安弘;荒川, 泰彦
JPS 2017 Fall meeting   21 Sep 2017   
メカニカルグラフェンの多様なエッジ状態とそのトポロジカルな起源
高橋雄太;苅宿俊風;初貝安弘
日本物理学会2016年秋季大会   13 Sep 2017   
Many-body states of a nearly flat band with kagome lattice
Kudo, K.;Hatsugai, Yasuhiro
Trends in Theory of Correlated Materials (TTCM2017)   10 Sep 2017   Japan Society for the promotion of science (JSPS) Bilateral Joint Research Seminar FY2017
Characterization of topological phases by the Weyl points of the entanglement Hamiltonian
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
28th International Conference on Low Temperature Physics   9 Aug 2017   
Bulk-edge correspondence in topological transport and pumping
Imura, K. -I.;Yoshimura, Y.;Fukui, T.;Hatsugai, Yasuhiro
28th International Conference on Low Temperature Physics   9 Aug 2017   
Characterization of topological phases by the Weyl points of the entanglement Hamiltonian
Kudo, Koji;Hatsugai, Yasuhiro
22nd International Conference on Electronic Properties of Two Dimensional Systems (EP2DS-22)   31 Jul 2017   
Topological Description of Tilted Dirac Fermions with/without Mass
Kawarabayashi, T.;Aoki, H.;Hatsugai, Yasuhiro
22nd International Conference on Electronic Properties of Two Dimensional Systems (EP2DS-22)   31 Jul 2017   
Uses of edge states of topological material and meta-material [Invited]
Hatsugai,Yasuhiro
JSPS-EPSRC core to core program seminar   10 Jul 2017   
Topological edge modes of light in all dielectric chiral woodpile structures stacked with π/4 in-plane rotation
Oono, S;Takahashi, S.;Iwamoto, S.;Hatsugai, Yasuhiro;Arakawa, Y.
18th International Conference on Physics of Light-Matter Coupling in Nanostructures (PIMCN18)   9 Jul 2017   
エンタングルメントチャーン数とそのトポロジカル絶縁体の相分類への適用
荒木広夢;初貝, 安弘
第62回物性若手夏の学校   Jul 2017   
Electronic Structures of Group IV Two Dimensional Materials [Invited]
Shiraishi, Kenji;Hattori, A.;Tanaya, S.;Yada, K.;Araidani, M.;Hatsugai, Yasuhiro;Sato, M.;Tanaka, Y.
13th International Conference on Diffusion in Solids and Liquids - DSL2017   26 Jun 2017   
「はじめに:バルク・エッジ対応の多様性と普遍性」
初貝,安弘
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts, startup meeting   25 Jun 2017   
Projected electron-electron interaction of Landau-Hofstadter bands on several lattices
K., Kudo;T., Kariyado;初貝, 安弘
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts, startup meeting   25 Jun 2017   
Optical Weyl Points below the Light Line in Semiconductor Chiral Woodpile Photonic Crystals
Takahashi, Shun; Oono, Shuhei; Iwamoto, Satoshi; Hatsugai, Yasuhiro; Arakawa, Yasuhiko
Conference on Lasers and Electro-Optics (CLEO)   14 May 2017   
ZN Berry phase and symmetry protected topological phase in spin chain
Kariyado, Toshikaze;Hatsugai, Yasuhiro
International conference on topological materials science 2017   9 May 2017   
Topological edge modes in broken inversion 3D photonic crystals [Invited]
Shuhei, Oono;Yasuhiro, Hatsugai
EMN Summer Meeting 2017   4 May 2017   
トポロジカル量子ポンプにおけるバルクエッジ対応
吉村幸徳;井村健一郎;初貝安弘;福井隆裕
日本物理学会第72回年次大会   17 Mar 2017   
平坦バンド系の乱れた臨界波動関数のマルチフラクタル解析
國府田桂介;初貝安弘
日本物理学会第72回年次大会   17 Mar 2017   
Entanglement Chern Number in Tree Dimensions
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
APS March Meeting 2017   17 Mar 2017   
全誘電体ウッドパイル型カイラルフォトニック結晶におけるトポロジカルエッジモード
高橋駿;荒川, 泰彦;大野, 修平;岩本, 敏;初貝安弘
日本物理学会第72回年次大会   17 Mar 2017   
磁場下の格子模型における擬ポテンシャルの厳密対角化:ラフリン状態の不安定化
工藤耕司;初貝安弘
日本物理学会第72回年次大会   17 Mar 2017   
格子模型における擬ゼロモードのトポロジカル安定性
河原林透;青木秀夫;初貝安弘
日本物理学会第72回年次大会   17 Mar 2017   
メカニカルダイヤモンドの多様なエッジ状態とカイラル対称性の破れ
高橋雄太;苅宿俊風;初貝安弘
日本物理学会第72回年次大会   17 Mar 2017   
半導体カイラルフォトニック結晶におけるワイル点とトポロジカルエッジ状態
高橋駿;大野, 修平;岩本, 敏;初貝安弘;荒川, 泰彦
第64回応用物理学会春季学術講演会   14 Mar 2017   
Chern number of many-body states on various lattices
Kudo, K.;Kariyado, T.;Hatsugai, Yasuhiro
APS March Meeting 2017   13 Mar 2017   
Edge states of mechanical diamond
Takahashi, Y.;Kariyado, T.;Hatsugai, Yasuhiro
APS March Meeting 2017   13 Mar 2017   
From graphene to topological materials [Invited]
Hatsugai, Yasuhiro
TIMS-CENIDE-NTHU Joint Symposium   11 Mar 2017   
Bulk-edge correspondence in Topological phases & Applications [Invited]
Hatsugai, Yasuhiro
CPEC seminar   9 Mar 2017   
Weak and strong phases of the Fu–Kane–Mele model by entanglement hamiltonians
Araki, H.;Fukui, T.;Hatsugai, Yasuhiro
Theory of Correlated Topological Materials   21 Feb 2017   
Bulk-edge correspondence in Thouless pumping & mechanical diamond [Invited]
Hatsugai, Yasuhiro
Topological metamaterials and beyond   2 Jan 2017   
物理学における対称性の役割とトポロジカル相
Hatsugai, Yasuhiro
千葉市科学館 平成 28 年度 「大人が楽しむ科学教室 ~量子力学シリーズ~」(7)   17 Dec 2016   
3次元メカニカルダイアモンドのエッジ状態
高橋雄太;苅宿俊風;初貝安弘
第10回 物性科学領域横断研究会 (領域合同研究会)   9 Dec 2016   
種々の格子模型における多粒子状態のチャーン数
工藤耕司;苅宿俊風;初貝安弘
第10回 物性科学領域横断研究会 (領域合同研究会)   9 Dec 2016   
トポロジカル物質の母としてのグラフェン [Invited]
Hatsugai, Yasuhiro
千葉市科学館 平成 28 年度 「大人が楽しむ科学教室 ~量子力学シリーズ~」(4)   4 Dec 2016   
Graphene as a mother of topological materials [Invited]
Hatsugai,Yasuhiro
JSPS-EPSRC Tohoku-Cambridge-CNRS Core to Core program Symposium "Two dimensional electronics/spintoronics devices"   16 Nov 2016   
Bulk-edge correspondence in topological pumping [Invited]
Hatsugai, Yasuhiro
KITP program, "Symmetry, Topology, and Quantum Phases of Matter: From Tensor Networks to Physical Realizations"   14 Oct 2016   
Roles of edge states in Thouless pumping
Hatsugai, Yasuhiro
Yukawa Institute for Theoretical Physics (YITP) international workshop, "Physics of bulk-edge correspondence and its universality: From solid state physics to cold atoms   27 Sep 2016   
傾いたディラック電子を持つ格子模型の連続変形
河原林透;青木秀夫;初貝安弘
日本物理学会2016年秋季大会   13 Sep 2016   
エンタングルメント・チャーン数で特徴付けられるスピン・ポンプ
福井隆裕;初貝安弘
日本物理学会2016年秋季大会   13 Sep 2016   
時間依存したフォトニック系におけるトポロジカルエッジモード
大野修平;初貝安弘
日本物理学会2016年秋季大会   13 Sep 2016   
二次元ディラック電子系のvortexに伴う非分数電荷のランダムネスに対する安定性
板垣諒;初貝安弘;青木秀夫;河原林透
日本物理学会2016年秋季大会   13 Sep 2016   
カゴメ格子上の分数量子ホール効果とチャーン数
工藤耕司;苅宿俊風;初貝安弘
日本物理学会2016年秋季大会   13 Sep 2016   
Zero modes of two-demensional tilted Dirac fermions with vortices
T., Kawarabayashi;H., Aoki;Y., Hatsugai
Graphene Week 2016   13 Jun 2016   
Roles of edge states in topological pumping
Hatsugai, Yasuhiro
Trends in Theory of Correlated Materials (TTCM2016)   22 May 2016   
Topologically protected propagating modes of electromagnetic waves in 3D photonic crystals without inversion symmetry
S.,Oono;T.,Kariyado;Y.,Hatsugai
17-th International conderence on physics of Light-Matter coupling in nanostructure   28 Mar 2016   
一般化されたカイラル対称性を持つ格子模型
T.,Kawarabayashi;Y.,Hatsugai;H.,Aoki
日本物理学会第71回年会   19 Mar 2016   
スピン1の系におけるZ3トポロジカル相と量子化ベリー位相
T.,Kariyado;T.,Morimoto;Y.,Hatsugai
日本物理学会第71回年会   19 Mar 2016   
トポロジカルポンプにおけるバルク・エッジ対応
Y.,Hatsugai;T.,Fukui
日本物理学会第71回年会   19 Mar 2016   
Gaussian 基底によるフォトニック結晶中電磁場の時間発展
S.,Oono;T.,Kariyado;Y.,Hatsugai
日本物理学会第71回年会   19 Mar 2016   

Teaching Experience

 
 

Association Memberships

 
 

Research Grants & Projects

 
Japan Society of for the Promotion of Science: Bilateral Joint Research Seminar FY2017
Project Year: Sep 2017 - Sep 2017    Investigator(s): Yasuhiro Hatsugai
Japan Society of for the Promotion of Science: Grant-in-Aid for Scientific Research (S)
Project Year: May 2017 - Mar 2022    Investigator(s): Yasuhiro Hatsugai
Topological Orders and Quantum Orders in Condensed Matter
Topological order parameters and geometrical phases by Majorana representations
Japan Society of for the Promotion of Science: 
Project Year: 2013 - 2014
Phases of matter described by geometrical phases: Application and their future development in quantum liquids and graphene
Japan Society of for the Promotion of Science: 
Project Year: 2011 - 2013
Quaternionic Berry connection of the Kramers multiplet and its physical applications
Japan Society of for the Promotion of Science: 
Project Year: 2011 - 2012