Kazuto Akiba

Profile Information

Affiliation: Assistant Professor, Graduate School of Natural Science and Technology, Okayama University

Degree: 博士（理学）(Mar, 2018, 東京大学)

J-GLOBAL ID: 201801007111031846
researchmap Member ID: 7000027105

External link: http://www.physics.okayama-u.ac.jp/~akiba

Research Interests

Research Areas

Natural sciences / Magnetism, superconductivity, and strongly correlated systems /

Research History

Apr, 2016 - Mar, 2018

日本学術振興会特別研究員 (DC2)

Education

Apr, 2015 - Mar, 2018

The University of Tokyo
Apr, 2013 - Mar, 2015

The University of Tokyo
Apr, 2009 - Mar, 2013

Department of Physics, School of Science, Nagoya University

Awards

Apr, 2019

Springer theses award
2018

理学系研究科研究奨励賞

Papers

Superconductivity in a ferroelectric-like topological semimetal SrAuBi

Hidefumi Takahashi, Tomohiro Sasaki, Akitoshi Nakano, Kazuto Akiba, Masayuki Takahashi, Alex H. Mayo, Masaho Onose, Tatsuo C. Kobayashi, Shintaro Ishiwata

npj Quantum Materials, 8(1) 77, Dec 20, 2023 Peer-reviewed
Variation of Landau level splitting in the Fermi level controlled Dirac metals (Eu, Gd)MnBi2

H. Sakai, K. Nakagawa, K. Tsuruda, J. Shiogai, K. Akiba, M. Tokunaga, S. Kimura, S. Awaji, A. Tsukazaki, H. Murakawa …

Phys. Rev. B, 108 115142, Sep 21, 2023 Peer-reviewed
Phonon-mediated superconductivity in the Sb square-net compound LaCuSb₂

Kazuto Akiba, Tatsuo C. Kobayashi

Phys. Rev. B, 107 245117, Jun 9, 2023 Peer-reviewedLead author
Effect of High Pressure on the Electrical Resistivity of Electric Toroidal Ordering Candidate Ca₅Ir₃O₁₂

K. Akiba, T. C. Kobayashi, M. Hayashida, K. Matsuhira

J. Phys. Soc. Jpn., 92 035002, Mar 15, 2023 Peer-reviewedLead author
Superconductivity in a Magnetic Rashba Semimetal EuAuBi

Hidefumi Takahashi, Kazuto Akiba, Masayuki Takahashi, Alex H. Mayo, Masayuki Ochi, Tatsuo C. Kobayashi, Shintaro Ishiwata

J. Phys. Soc. Jpn., 92 013701, Dec 1, 2022 Peer-reviewed
Observation of superconductivity and its enhancement at the charge density wave critical point in LaAgSb2

Kazuto Akiba, Nobuaki Umeshita, Tatsuo C. Kobayashi

Phys. Rev. B, 106 L161113, Oct 27, 2022 Peer-reviewedLead author
Topological Phase Transitions and Critical Phenomena Associated with Unwinding of Spin Crystals by High Magnetic Fields

N. Kanazawa, Y. Fujishiro, K. Akiba, R. Kurihara, H. Mitamura, A. Miyake, A. Matsuo, K. Kindo, M. Tokunaga, Y. Tokura

J. Phys. Soc. Jpn., 91(10) 101002, Oct 15, 2022 Peer-reviewedInvited
Site Split of Antiferromagnetic α-Mn Revealed by ⁵⁵Mn Nuclear Magnetic Resonance

Masahiro Manago, Gaku Motoyama, Shijo Nishigori, Kenji Fujiwara, Katsuki Kinjo, Shunsaku Kitagawa, Kenji Ishida, Kazuto Akiba, Shingo Araki, Tatsuo C. Kobayashi …

J. Phys. Soc. Jpn., 91 113701, Oct 6, 2022 Peer-reviewed
Spin-orbit-derived giant magnetoresistance in a layered magnetic semiconductor AgCrSe2

H. Takahashi, T. Akiba, A. H. Mayo, K. Akiba, A. Miyake, M. Tokunaga, H. Mori, R. Arita, S. Ishiwata

Phys. Rev. Mater., 6 054602, May 27, 2022 Peer-reviewed
Magnetotransport studies of the Sb square-net compound LaAgSb2 under high pressure and rotating magnetic fields

K. Akiba, N. Umeshita, T. C. Kobayashi

Phys. Rev. B, 105 035108, Jan 6, 2022 Peer-reviewedLead author
Successive destruction of charge density wave states by pressure in LaAgSb2

K. Akiba, H. Nishimori, N. Umeshita, T. C. Kobayashi

Phys. Rev. B, 103 085134-1-085134-13, Feb 22, 2021 Peer-reviewedLead author
Domain Control by Adjusting Anisotropic Stress in Pyrochlore Oxide Cd2Re2O7

S. Tajima, D. Hirai, Y. Kinoshita, M. Tokunaga, K. Akiba, T. C. Kobayashi, H. T. Hirose, Z. Hiroi

J. Phys. Soc. Jpn., 89 114711-1-114711-14, Oct 23, 2020 Peer-reviewed
Anomalous Hall effect triggered by pressure-induced magnetic phase transition in α-Mn

K. Akiba, K. Iwamoto, T. Sato, S. Araki, T. C. Kobayashi

Phys. Rev. Research, 2(4) 043090-1-043090-6, Oct 16, 2020 Peer-reviewedLead author
Magnetotransport properties of tellurium under extreme conditions

K. Akiba, K. Kobayashi, T. C. Kobayashi, R. Koezuka, A. Miyake, J. Gouchi, Y. Uwatoko, M. Tokunaga

Phys. Rev. B, 101 245111-1-245111-6, Jun 2, 2020 Peer-reviewedLead author
Pressure-Temperature Phase Diagram of α-Mn

T. Sato, K. Akiba, S. Araki, T. C. Kobayashi

JPS Conf. Proc., 30 011030, Mar 19, 2020 Peer-reviewed
Bidirectional surface photovoltage on a topological insulator

T. Yoshikawa, K. Sumida, Y. Ishida, J. Chen, M. Nurmamat, K. Akiba, A. Miyake, M. Tokunaga, K. A. Kokh, O. E. Tereshchenko …

Phys. Rev. B, 100 165311, Oct 31, 2019 Peer-reviewed
Large Enhancement of Thermoelectric Efficiency Due to a Pressure-Induced Lifshitz Transition in SnSe

T. Nishimura, H. Sakai, H. Mori, K. Akiba, H. Usui, M. Ochi, K. Kuroki, A. Miyake, M. Tokunaga, Y. Uwatoko …

Phys. Rev. Lett., 122(22) 226601-1-6, Jun, 2019 Peer-reviewed
Quantized surface transport in topological Dirac semimetal films

S. Nishihaya, M. Uchida, Y. Nakazawa, R. Kurihara, K. Akiba, M. Kriener, A. Miyake, Y. Taguchi, M. Tokunaga, M. Kawasaki

Nat. Commun., 10(1) 2564, Jun, 2019 Peer-reviewed
Topological transitions among skyrmion- and hedgehog-lattice states in cubic chiral magnets

Y. Fujishiro, N. Kanazawa, T. Nakajima, X.Z. Yu, K. Ohishi, Y. Kawamura, K. Kakurai, T. Arima, H. Mitamura, A. Miyake …

Nat. Commun., 10 1059, Mar, 2019 Peer-reviewed
Thermodynamic evidence of magnetic-field-induced complete valley polarization in bismuth

A. Iwasa, A. Kondo, S. Kawachi, K. Akiba, Y. Nakanishi, M. Yoshizawa, M. Tokunaga, K. Kindo

Sci. Rep., 9 1672, Feb 8, 2019 Peer-reviewed

Misc.

Quantum transport phenomena in narrow-gap semiconductors under high pressure and high magnetic field

Review of High Pressure Science and Technology, 30 260-273, Dec, 2020 Peer-reviewedLead author
PbTeにおける「ディラックネス」の評価

秋葉和人, 三宅厚志, 徳永将史

固体物理, 54 201-213, Apr, 2019 Peer-reviewedLead author
圧力下の半金属黒燐における異常量子伝導

秋葉和人, 三宅厚志, 徳永将史, 赤浜裕一

固体物理, 51 249-258, Apr, 2016 Peer-reviewedLead author

Books and Other Publications

Electronic States of Narrow-Gap Semiconductors Under Multi-Extreme Conditions

Kazuto Akiba

Springer Singapore, 2019

Presentations

圧力による連続制御と極限環境下精密測定で拓く新奇電子物性

秋葉和人

第64回高圧討論会, Nov 1, 2023 Invited
CeAgSb2の圧力下交流比熱測定

秋葉和人, 小林達生

日本物理学会第78回年次大会, Sep 17, 2023
圧力下のLaAuSb2における電荷密度波と超伝導の相関関係

秋葉和人, 小林達生

日本物理学会 2023年春季大会, Mar 23, 2023
LaAgSb2の圧力誘起CDW臨界点における超伝導の増強現象

秋葉和人, 梅下暢朗, 小林達生

日本物理学会 2022年秋季大会, Sep 12, 2022
LaAgSb2の圧力誘起CDW臨界点における電荷揺らぎ超伝導の可能性

秋葉和人, 梅下暢朗, 小林達生

第1回アシンメトリ量子研究会, Aug 9, 2022
Superconductivity and its enhancement at the charge-density-wave critical point in LaAgSb2

Kazuto Akiba

Progress in Superconductivity Research – RIIS Mini-Workshop –, May 13, 2022
圧力下のLaAgSb2における電荷密度波と超伝導の相関関係

秋葉和人, 梅下暢朗, 小林達生

日本物理学会第77回年次大会（2022年）, Mar 16, 2022
磁場中・圧力下の電気伝導測定から見るトポロジカル物質の電子状態

秋葉和人

ワークショップ（5）「超伝導物質、トポロジカル物質」（SCTM2021）, Nov 26, 2021 Invited
電荷密度波物質LaAgSb2における圧力下量子輸送現象の磁場方位依存性

秋葉和人, 梅下暢朗, 小林達生

日本物理学会 2021年秋季大会, Sep, 2021
LaAgSb2における電荷密度波の圧力温度相図と圧力下におけるFermi面の変化

秋葉和人, 西森弘顕, 梅下暢朗, 小林達生

日本物理学会第76回年次大会, Mar, 2021
Magneto-transport properties of elemental semiconductor tellurium under high pressure and high magnetic field

K. Akiba, K. Kobayashi, T. C. Kobayashi, R. Koezuka, A. Miyake, J. Gouchi, Y. Uwatoko, M. Tokunaga

Asian Regional High Magnetic Field Conference (ARHMF2020)
α-Mnの圧力誘起磁性相における異常Hall効果

秋葉和人, 岩本凱成, 佐藤飛諒, 荒木新吾, 小林達生

日本物理学会2020年秋季大会
電荷密度波物質LaAgSb2の圧力下磁気輸送特性

秋葉和人, 小林達生

日本物理学会第75回年次大会
Quantum Transport Properties on Chemically Etched (0001) Surface of Tellurium

K. Akiba, S. Asada, K. Kobayashi, T. C. Kobayashi, R. Koezuka, and M. Tokunaga

International Conference on Strongly Correlated Electron System 2019 (SCES2019)
化学エッチングしたTeの(0001)表面における量子輸送現象

秋葉和人, 浅田翔一朗, 小林夏野, 小林達生, 肥塚遼, 徳永将史

日本物理学会2019年秋季大会
Pressure-temperature phase diagram of alpha-Mn

K. Akiba

Progress in Superconductivity Research -RIIS Mini Workshop-
圧力下におけるPbTeの電気伝導測定

秋葉和人, 小林達生, 三宅厚志, 酒井英明, 片山敬介, 村川寛, 花咲徳亮, 鷹岡貞夫, 上床美也, 徳永将史

日本物理学会第74回年次大会
量子振動から評価するPbTeの”Diracness”とその圧力変化

秋葉和人, 三宅厚志, 酒井英明, 片山敬介, 村川寛, 花咲徳亮, 鷹岡貞夫, 中西良樹, 吉澤正人, 小林達生, 徳永将史

スピン軌道強結合伝導系におけるサイエンスの新展開
PbTeにおける“Diracness”の評価とその圧力依存性

秋葉和人, 三宅厚志, 酒井英明, 片山敬介, 村川寛, 花咲徳亮, 鷹岡貞夫, 中西良樹, 吉澤正人, 小林達生, 徳永将史

日本物理学会秋季大会, 2018
Quantitative evaluation of “Diracness” through the quantum oscillation measurements in PbTe

K. Akiba, A. Miyake, H. Sakai, K. Katayama, H. Murakawa, N. Hanasaki, S. Takaoka, Y. Nakanishi, M. Yoshizawa, and M. Tokunaga

The 12th International Conference on Research in High Magnetic Fields (RHMF 2018), 2018

Professional Memberships

2013 - Present

日本物理学会

Research Projects

Exploration and elucidation of band electrons at 1000 T

Grants-in-Aid for Scientific Research, Grant-in-Aid for Transformative Research Areas (A), Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2028
La系層状金属間化合物における電荷秩序と超伝導の相関関係の解明

科学研究費助成事業, 若手研究, 日本学術振興会, Apr, 2022 - Mar, 2024

秋葉和人
Function creation in polar metals

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2024
圧力下のPbTeにおけるトポロジカル電子相実現の実証とその物性解明

科学研究費助成事業若手研究, 若手研究, 日本学術振興会, Apr, 2019 - Mar, 2022

秋葉和人

Profile Information

Research Interests

Research Areas

Research History

Education

Awards

Papers

Misc.

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