Kobayashi Kaya

Profile Information

Affiliation: Professor, Research Institute for Electronic Science, Hokkaido University

Degree: 博士(工学)(東京大学)

J-GLOBAL ID: 201801010825384999
Researcher ID: T-6258-2019
researchmap Member ID: B000312843

Research Areas

Education

Committee Memberships

Apr, 2023 - Present

ダイバーシティ推進委員会委員長, 日本物理学会
Apr, 2021 - Mar, 2023

第77期男女共同参画推進委員会委員, 日本物理学会
Oct, 2013 - Sep, 2014

日本物理学会領域７運営委員
Mar, 2014

応用物理学関係連合講演会現地実行委員
Mar, 2007

応用物理学関係連合講演会現地実行委員

Awards

2014

PRL Editor's Suggestion

Papers

Valley polarization dependence of nonreciprocal transport in a chiral semiconductor

Kenta Sudo, Yuki Yanagi, Takeshi Takahashi, Kim-Khuong Huynh, Katsumi Tanigaki, Kaya Kobayashi, Michi-To Suzuki, Motoi Kimata

Physical Review B, 108(12), Sep 22, 2023
Origin of Unexpected Ir³⁺ in a Superconducting Candidate Sr₂IrO₄ System Analyzed by Photoelectron Holography

Rie Horie, Tomohiro Matsushita, Sota Kawamura, Tsubasa Hase, Kazumasa Horigane, Hiroki Momono, Soichiro Takeuchi, Masaki Tanaka, Hiroto Tomita, Yusuke Hashimoto …

Inorganic Chemistry, 62(28) 10897-10904, Jun 2, 2023
Multiple-site Ag doping in Bi2Se3: Compositional crossover from substitution to intercalation as revealed by photoelectron diffraction and X-ray fluorescence holography

Fumihiko Matsui, Hiroshi Ota, Ritsuko Eguchi, Hidenori Goto, Kaya Kobayashi, Jun Akimitsu, Hikaru Ozaki, Takumi Nishioka, Koji Kimura, Kouichi Hayashi …

Journal of Electron Spectroscopy and Related Phenomena, 264 147295-147295, Apr, 2023
Chiral phonons: circularly polarized Raman spectroscopy and ab initio calculations in a chiral crystal tellurium

Kyosuke Ishito, Huiling Mao, Kaya Kobayashi, Yusuke Kousaka, Yoshihiko Togawa, Hiroaki Kusunose, Jun‐ichiro Kishine, Takuya Satoh

Chirality, Mar 9, 2023
Semiconductor–metal transition in Bi2Se3 caused by impurity doping

Takaki Uchiyama, Hidenori Goto, Eri Uesugi, Akihisa Takai, Lei Zhi, Akari Miura, Shino Hamao, Ritsuko Eguchi, Hiromi Ota, Kunihisa Sugimoto …

Scientific Reports, 13(1), Jan 11, 2023
Full superconducting gap in the candidate topological superconductor In1−xPbxTe for x=0.2

M. P. Smylie, Kaya Kobayashi, J. Z. Dans, H. Hebbeker, R. Chapai, W.-K. Kwok, U. Welp

Physical Review B, 106(5) 054503-054503, Aug 2, 2022 Peer-reviewed
Current-induced magnetization caused by crystal chirality in nonmagnetic elemental tellurium

Tetsuya Furukawa, Yuta Watanabe, Naoki Ogasawara, Kaya Kobayashi, Tetsuaki Itou

Physical Review Research, 3(2), May 10, 2021 Peer-reviewed
Hole doping and chemical pressure effects on the strong coupling superconductor PdTe

Li Chen, Ando Ide, Harald O. Jeschke, Kaya Kobayashi

Physical Chemistry Chemical Physics, 23(23) 13331-13337, 2021 Peer-reviewedLast authorCorresponding author
Superconductivity in Bi2−x Sb x Te3−y Se y (x = 1.0 and y = 2.0) under pressure

Kaya Kobayashi

Journal of Physics: Condensed Matter, 32(46) 465702-465702, Nov 4, 2020 Peer-reviewed
Time-reversal invariant and fully gapped unconventional superconducting state in the bulk of the topological compound Nb0.25Bi2Se3

Debarchan Das, K. Kobayashi, M. P. Smylie, C. Mielke, T. Takahashi, K. Willa, J.-X. Yin, U. Welp, M. Z. Hasan, A. Amato …

Physical Review B, Oct 29, 2020 Peer-reviewed
Magnetotransport properties of tellurium under extreme conditions

Kazuto Akiba, Kaya Kobayashi, Tatsuo C. Kobayashi, Ryo Koezuka, Atsushi Miyake, Jun Gouchi, Yoshiya Uwatoko, Masashi Tokunaga

Physical Review B, 101(24), Jun 2, 2020 Peer-reviewed
Optical signatures of phase transitions and structural modulation in elemental tellurium under pressure

Diego Rodriguez, Alexander A. Tsirlin, Tobias Biesner, Teppei Ueno, Takeshi Takahashi, Kaya Kobayashi, Martin Dressel, Ece Uykur

Physical Review B, May 6, 2020 Peer-reviewed
Superconductivity in 5d transition metal Laves phase SrIr2

R Horie, K Horigane, S Nishiyama, M Akimitsu, K Kobayashi, S Onari, T Kambe, Y Kubozono, J Akimitsu

Journal of Physics: Condensed Matter, 32(17) 175703-175703, Apr 24, 2020 Peer-reviewed
Two Linear Regimes in Optical Conductivity of a Type-I Weyl Semimetal: The Case of Elemental Tellurium

Diego Rodriguez, Alexander A. Tsirlin, Tobias Biesner, Teppei Ueno, Takeshi Takahashi, Kaya Kobayashi, Martin Dressel, Ece Uykur

Physical Review Letters, Mar 30, 2020 Peer-reviewed
Superconducting Properties of AgSnSe2 Studied by 77Se-NMR and 119Sn-NMR

K. Watanabe, Y. Naijo, K. Hada, T. Furukawa, T. Itou, T. Ueno, K. Kobayashi, J. Akimitsu

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019), Mar 19, 2020
μSR Study of the Magnetic State in Hole and Electron Doped Sr2IrO4

S. Tsunoda, K. Horigane, H. Okabe, K. Machida, M. Akimitsu, K. Kawashima, R. Horie, K. Kobayashi, A. Koda, R. Kadono …

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019), Mar 19, 2020
Nodeless superconducting gap in the candidate topological superconductor Sn1−xInxTe for x=0.7

M. P. Smylie, Kaya Kobayashi, T. Takahashi, C. Chaparro, A. Snezhko, W.-K. Kwok, U. Welp

Physical Review B, Mar 13, 2020 Peer-reviewed
Unusual electronic state of Sn in AgSnSe2

Y. Naijo, K. Hada, T. Furukawa, T. Itou, T. Ueno, K. Kobayashi, I. I. Mazin, H. O. Jeschke, J. Akimitsu

Physical Review B, 101(7) 075134, Feb 25, 2020 Peer-reviewed
Superconducting 3R-Ta1+xSe2 with Giant In-Plane Upper Critical Fields

Kaya Kobayashi

Nano Letters, 20(3) 1725-1730, Feb 5, 2020 Peer-reviewed
Superconducting behavior of a new metal iridate compound, SrIr<inf>2</inf>, under pressure

Xiaofan Yang, Huan Li, Tong He, Tomoya Taguchi, Yanan Wang, Hidenori Goto, Ritsuko Eguchi, Rie Horie, Kazumasa Horigane, Kaya Kobayashi …

Journal of Physics Condensed Matter, 32(2), 2020 Peer-reviewed

Misc.

カイラル半導体Teの不純物散乱領域における非相反磁気抵抗

須藤健太, 古川哲也, 小笠原直輝, 高橋武士, 小林夏野, 伊藤哲明, 木俣基

日本物理学会第77回年次大会, 15pPSC-20, Mar 15, 2022
カイラル半導体Teの非相反磁気抵抗における量子振動

須藤健太, 古川哲也, 小笠原直輝, 高橋武士, 小林夏野, 伊藤哲明, 木俣基

日本物理学会2021年秋季大会, 21pC2-5, Sep 21, 2021
Impact of Sb doping on critical parameters of PdTe type-Ⅱ superconductor

Li Chen, Ando Ide, Kaya Kobayashi

15aD1-3, Mar 15, 2021
Ag0.8Sn1.2Se2 単結晶の顕微光電子分光

脇田高徳, 片岡範行, Li Ya Jun, 室隆桂之, 小林夏野, 上野哲平, 秋光純, 村岡祐治, Naurang L. Saini, 横谷尚睦

日本物理学会第76回年次大会, 13aE2-8, Mar 13, 2021
カイラル半導体Teにおける量子振動と非相反伝導

須藤健太, 古川哲也, 小笠原直輝, 高橋武士, 小林夏野, 伊藤哲明, 木俣基

PSH-103, Mar, 2021
Aperiodic electronic superstructure in a misfit layered chalcogenide

幸坂祐生, 白田雅治, 上野哲平, 町田理, 花栗哲郎, 小林夏野, 小林夏野

日本物理学会講演概要集(CD-ROM), 76(2), 2021
Aperiodic electronic superstructure in a misfit layered chalcogenide

幸坂祐生, 白田雅治, 上野哲平, 町田理, 花栗哲郎, 小林夏野, 小林夏野

日本表面真空学会学術講演会要旨集(Web), 2021, 2021
Superconductivity enhancement in metal intercalated PdTe2

9pH1-6, Sep 9, 2020
(Pb1-xTlx)Te超伝導体における不純物サイトのNMR緩和率とナイトシフト測定から見た電荷近藤効果

堀川瑠星, 八島光晴, 椋田秀和, 三宅和正, 村上博成B, P. Walmsley, P. Giraldo-Gallo, T. Geballe, I. Fisher, 高橋武士 …

日本物理学会第75回年次大会, 18pPSA-102, Mar 18, 2020
ラーベス相Au化合物の超伝導Ⅲ

高橋武士, Harald O Jeschke, 秋光純, 二宮博樹, 石田茂之, 永崎洋, 小林夏野

日本物理学会第75回年次大会, 18pPSA-107, Mar 18, 2020
Higher-dimensional density wave in a misfit layered compound (PbSe)_1.16(TiSe₂)₂

幸坂祐生, 上野哲平, 町田理, 花栗哲郎, 秋光純, 小林夏野, 小林夏野

日本物理学会講演概要集(CD-ROM), 75(1), 2020
Spectroscopic imaging scanning tunneling microscopy of a misfit layered compound (SnSe)_1+δ(TiSe₂)₂

幸坂祐生, 白田雅治, 上野哲平, 花栗哲郎, 小林夏野, 小林夏野

日本物理学会講演概要集(CD-ROM), 75(2), 2020
Quasiparticle interference of mitfit layered compound (PbSe)_1+δ(TiSe₂)₂

Kohsaka Yuhki, Ueno Teppei, Machida Tadashi, Hanaguri Tetsuo, Akimitsu Jun, Kobayashi Kaya

Meeting Abstracts of the Physical Society of Japan, 75.1 1170-1170, 2020
μSR study in lightly electron doped Sr_2-xLa_xIrO₄

堀金和正, 角田了, 岡部博孝, 町田一樹, 堀江理恵, 小林夏野, 小林夏野, 秋光正子, 幸田章宏, 門野良典 …

日本物理学会講演概要集(CD-ROM), 75(1), 2020
Higher-dimensional density wave in mitfit layered compound (PbSe)_1+δ(TiSe₂)₂

Kohsaka Yuhki, Ueno Teppei, Machida Tadashi, Hanaguri Tetsuo, Akimitsu Jun, Kobayashi Kaya

Meeting Abstracts of the Physical Society of Japan, 74.2 976-976, 2019
STM/STS measurements of (Sr,La)2IrO4

Kohsaka Yuhki, Fujii Masanori, Horigane Kazumasa, Kobayashi Kaya, Horie Rie, Hanaguri Tetsuo, Akimitsu Jun

Meeting Abstracts of the Physical Society of Japan, 74.1 2307-2307, 2019
Pressure-induced superconductivity of Bi_2-xSb_xTe_3-ySe_y (x = 0, 0.25, 0.5, 1.0, y = 1.0 and x =1.0, y = 2.0)

HE Tong, YANG Xiaofan, TAGUCHI Tomoya, GOTO Hidenori, EGUCHI Ritsuko, KOBAYASHI Kaya, AKIMITSU Jun, YAMAOKA Hitoshi, ISHII Hirofumi, LIAOB Yen-Fa …

日本物理学会講演概要集(CD-ROM), 74(2), 2019
(Sr,La)₂IrO₄のSTM/STS測定

幸坂祐生, 藤井政徳, 堀金和正, 小林夏野, 小林夏野, 堀江理恵, 花栗哲郎, 秋光純

日本物理学会講演概要集(CD-ROM), 74(1), 2019
μSR法を用いたSr_2-xLa_xIrO₄の磁気相図の決定

町田一樹, 堀金和正, 藤井政徳, 岡部博孝, 小林夏野, 小林夏野, 堀江理恵, 石井啓文, 久保園芳博, 久保園芳博 …

日本物理学会講演概要集(CD-ROM), 74(1), 2019
高圧合成法を用いたアルカリ金属を含む新規超伝導体の探索および物性評価

竹内和也, 堀金和正, 堀江理恵, 小林夏野, 小林夏野, 磯部雅朗, 秋光純

日本物理学会講演概要集(CD-ROM), 74(1), 2019

Books and Other Publications

Superconductivity in carbides

Kobayashi Kaya (Role: Joint author)

Springer, Jul, 2019

Presentations

Possible valence skipping superconductivity in doped Dirac metal

Kaya Kobayashi, T. Ueno, T. Wakita, T. Furukawa, T. Itou, T. Yokoya

Material Research Meeting 2019, Dec 13, 2019 Invited
量子極限近傍における角度依存磁気抵抗振動の量子効果

日本物理学会第59回年次大会(日本物理学会), 2004
Quantum Features of Angular Dependent Magnetoresistance Oscillations in Q2D Conductors near High Magnetic Field Quantum Limet

ICSM(ICSM2004), 2004
Study of Electronic Structure of Low Temperature Phase in K-(BEDーTTF)_2 KHg(SCN)_4 Using Angular Dependent Magnetoresistance Oscillations

ISCOM(ISCOM2003), 2003
Electric Field Effect on Vertical Transport in Multilayer Systems under Tilted Magnetic Fields

EP2DS(EP2DS15), 2003
擬1次元導体の磁気抵抗効果における量子効果

日本物理学会第58回年次大会(日本物理学会), 2003
Growth and Transport Measurement of (TMTSF)_2PF_6/(TMTSF)_2ClO_4

ICSM(ICSM2002), 2002
低次元導体の磁気抵抗角度効果の強電場効果

日本物理学会秋季大会(日本物理学会), 2002

Professional Memberships

Works

Research Projects

Development of Archetypal Asymmetric Quantum Matters

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
Research Management of Unveiling, Design, and Development of Asymmetric Quantum Matters

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
Morphology control of PBA core-shell nanoparticles and the TEM observation of Nano-hetero surfaces

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2020 - Mar, 2023
Establishment of a New Magnetoelectric Phenomenon - Current-Induced Magnetization

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2019 - Mar, 2022

Itou Tetsuaki
Valence-skip mechanism of superconductivity in doped Dirac electron system

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2021

Kobayashi Kaya
New magnetoelectric effect and nuclear spin manupulation in elemental tellurium

Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, Japan Society for the Promotion of Science, Apr, 2015 - Mar, 2017

Itou Tetsuaki

Media Coverage

東京理科大学、岡山大学テルル、電流で磁化次世代情報処理技術に

化学工業日報, Oct 24, 2017 Newspaper, magazine

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