Kobayashi Koji 小林浩二

Researcher Number	10711905
Other IDs	https://orcid.org/0000-0001-7223-607X
Affiliation (Current)	2025: 上智大学, 理工学部, 助教
Affiliation (based on the past Project Information) *help	2023: 上智大学, 理工学部, 研究員 2022: 九州大学, 理学研究院, 特任助教 2019 – 2022: 東北大学, 金属材料研究所, 特任助教
Review Section/Research Field	Principal Investigator Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
Keywords	Principal Investigator 相転移 / 輸送現象 / 臨界現象 / 異常ホール効果 / トポロジカル量子系 / 量子臨界現象 / 機械学習 / スピンホール効果 / 磁性ワイル半金属 / トポロジカル物質 / 量子輸送現象 / 量子相転移 / ワイル半金属

Numerical study on critical properties of topological quantum systems with broken translational symmetryPrincipal Investigator
- Principal Investigator
  
  小林浩二
- Project Period (FY)
  2022 – 2026
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
- Research Institution
  Sophia University
  Kyushu University
Numerical study of critical phenomena in disordered topological quantum systemsPrincipal Investigator
- Principal Investigator
  
  Kobayashi Koji
- Project Period (FY)
  2019 – 2022
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
- Research Institution
  Tohoku University

All 2024 2023 2022 2021 2020 2019

All Journal Article Presentation

[Journal Article] Effective Model Analysis of Intrinsic Spin Hall Effect with Magnetism in the Stacked Kagome Weyl Semimetal Co3Sn2S22024
- Author(s)
  Ozawa Akihiro, Kobayashi Koji, Nomura Kentaro
- Journal Title
  
  Physical Review Applied
  
  Volume: 21 Issue: 1 Pages: 0140411-9
- DOI
  10.1103/physrevapplied.21.014041
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23K19194, KAKENHI-PROJECT-22K03446, KAKENHI-PROJECT-20H01830
[Journal Article] Effective Tight-Binding Model of Compensated Ferrimagnetic Weyl Semimetal with Spontaneous Orbital Magnetization2024
- Author(s)
  Meguro Tomonari, Ozawa Akihiro, Kobayashi Koji, Nomura Kentaro
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 93 Issue: 3 Pages: 0347031-6
- DOI
  10.7566/jpsj.93.034703
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23K19194, KAKENHI-PROJECT-22K03446, KAKENHI-PROJECT-20H01830
[Journal Article] Intrinsic and Extrinsic Anomalous Hall Effects in Disordered Magnetic Weyl Semimetal2022
- Author(s)
  Kobayashi Koji、Nomura Kentaro
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 91 Issue: 1
- DOI
  10.7566/jpsj.91.013703
- NAID
  210000159516
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K14607
[Journal Article] Magnetic Orderings from Spin-Orbit Coupled Electrons on Kagome Lattice2022
- Author(s)
  Watanabe Jin、Araki Yasufumi、Kobayashi Koji、Ozawa Akihiro、Nomura Kentaro
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 91 Issue: 8
- DOI
  10.7566/jpsj.91.083702
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22K03446
[Journal Article] Wannier-based implementation of the coherent potential approximation with applications to Fe-based transition metal alloys2022
- Author(s)
  Ito Naohiro、Nomoto Takuya、Kobayashi Koji、Mankovsky Sergiy、Nomura Kentaro、Arita Ryotaro、Ebert Hubert、Koretsune Takashi
- Journal Title
  
  Physical Review B
  
  Volume: 105 Issue: 12 Pages: 125136-125136
- DOI
  10.1103/physrevb.105.125136
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K03442, KAKENHI-PROJECT-21H04990, KAKENHI-PROJECT-21J10577, KAKENHI-PROJECT-19H00650, KAKENHI-PROJECT-21H01003, KAKENHI-PROJECT-19K14607, KAKENHI-PROJECT-21H04437
[Journal Article] Quantum Hall effect induced by chiral Landau levels in topological semimetal films2021
- Author(s)
  Nguyen D.-H.-Minh、Kobayashi Koji、Wichmann Jan-Erik R.、Nomura Kentaro
- Journal Title
  
  Physical Review B
  
  Volume: 104 Issue: 4 Pages: 0453021-12
- DOI
  10.1103/physrevb.104.045302
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20H01830, KAKENHI-PROJECT-19K14607
[Journal Article] Ferromagnetic-electrodes-induced Hall effect in topological Dirac semimetals2021
- Author(s)
  Kobayashi Koji、Nomura Kentaro
- Journal Title
  
  Physical Review Research
  
  Volume: 3 Issue: 3 Pages: 0330231-11
- DOI
  10.1103/physrevresearch.3.033023
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-20H01830, KAKENHI-PROJECT-19K14607
[Journal Article] Ballistic transport in disordered Dirac and Weyl semimetals2020
- Author(s)
  Kobayashi Koji、Wada Miku、Ohtsuki Tomi
- Journal Title
  
  Physical Review Research
  
  Volume: 2 Issue: 2
- DOI
  10.1103/physrevresearch.2.022061
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K14607, KAKENHI-PROJECT-19H00658
[Journal Article] Robust magnetotransport in disordered ferromagnetic kagome layers with quantum anomalous Hall effect2019
- Author(s)
  Kobayashi Koji、Takagaki Masaki、Nomura Kentaro
- Journal Title
  
  Physical Review B
  
  Volume: 100 Issue: 16
- DOI
  10.1103/physrevb.100.161301
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K05485, KAKENHI-PROJECT-19K14607, KAKENHI-PLANNED-15H05854
[Presentation] フェリ磁性ワイル半金属の有効強束縛模型を用いたスピン軌道トルクの計算および解析2024
- Author(s)
  目黒智成、小沢耀弘、小林浩二、野村健太郎
- Organizer
  日本物理学会2024年春季大会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] Controllable anomalous Hall effect in topological Dirac semimetals2024
- Author(s)
  Tomonari Meguro, Akihiro Ozawa, Koji Kobayashi, Kentaro Nomura
- Organizer
  APS March Meeting 2024
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] 機械学習による乱れた電子系の相図決定手法の改良：波動関数のプーリング2024
- Author(s)
  小林浩二、大槻東巳
- Organizer
  日本物理学会2024年春季大会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] 乱れたトポロジカル量子系の相図決定手法の改良：Transformerとpooling2024
- Author(s)
  小林浩二、大槻東巳
- Organizer
  第２回学術変革領域「学習物理」物性関係討論会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] カゴメ層状強磁性ワイル半金属Co3Sn2S2薄膜におけるホール伝導度の数値計算2023
- Author(s)
  小林浩二，小沢耀弘，野村健太郎
- Organizer
  日本物理学会2023年春季大会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] 磁性ワイル半金属Co3Sn2S2有効模型におけるスピン/異常ホール効果の理論解析2023
- Author(s)
  小沢耀弘，小林浩二，野村健太郎
- Organizer
  日本物理学会2023年春季大会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] 補償フェリ磁性ワイル半金属の有効強束縛模型2023
- Author(s)
  目黒智成、小沢耀弘、小林浩二、野村健太郎
- Organizer
  日本物理学会第78回年次大会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] Vision Transformerを用いた乱れたトポロジカル量子系の相図決定手法の開発2023
- Author(s)
  小林浩二、大槻東巳
- Organizer
  第17回物性科学領域横断研究会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] トポロジカルDiracメモリスタ　-ニューロモルフィックコンピュータに向けて-2023
- Author(s)
  小林浩二、野村健太郎
- Organizer
  学術変革領域「学習物理」物性関係討論会
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] Controllable anomalous Hall effect in topological Dirac semimetals2023
- Author(s)
  K. Kobayashi, K. Nomura
- Organizer
  APS March Meeting 2023
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] Drawing phase diagrams from wavefunctions in topological systems with random potential using Vision Transformer2023
- Author(s)
  Koji Kobayashi, Tomi Ohtsuki
- Organizer
  International Conference on Machine Learning Physics
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] Wannier関数を用いたCPA計算の実装2022
- Author(s)
  伊東直洋, 野本拓也, 小林浩二, Sergiy Mankovsky, 野村健太郎, 有田亮太郎, F, Hubert Ebert, 是常隆
- Organizer
  日本物理学会第77回年次大会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] Relation Between Anomalous Hall and Longitudinal Conductances in Disordered Weyl Metals2022
- Author(s)
  K. Kobayashi, K. Nomura
- Organizer
  Localisation 2022
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] Relation Between Anomalous Hall and Longitudinal Conductances in Disordered Magnetic Weyl Semimetal Films2022
- Author(s)
  K. Kobayashi, K. Nomura
- Organizer
  LT29
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03446
[Presentation] ワイル半金属における内因性・外因性ホール効果と縦伝導度2021
- Author(s)
  小林浩二、野村健太郎
- Organizer
  日本物理学会第76回年次大会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] ワイル半金属における内因性ホール効果と縦伝導度(Intrinsic Hall conductance and longitudinal conductance in Weyl semimetals)2021
- Author(s)
  小林浩二，野村健太郎
- Organizer
  第140回金属材料研究所講演会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] Relation Between Hall and Longitudinal Conductances in Disordered Magnetic Weyl Semimetal Thin Films2021
- Author(s)
  K. Kobayashi, K. Nomura
- Organizer
  EP2DS-24/MSS-20
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] トポロジカルディラック半金属を用いた連続的抵抗制御：トポロジカルディラックメモリスタ(Continuous control of resistance with topological Dirac semimetals: topological Dirac memristor)2021
- Author(s)
  小林浩二，野村健太郎
- Organizer
  日本物理学会2021年秋季大会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] Ballistic feature in disordered Dirac and Weyl semimetals2021
- Author(s)
  K. Kobayashi, M. Wada, T. Ohtsuki
- Organizer
  APS March Meeting 2021
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] Critical behavior of ballistic transport in disordered Dirac and Weyl semimetals2020
- Author(s)
  Koji Kobayashi, Miku Wada, Tomi Ohtsuki
- Organizer
  Localisation 2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] 強磁性電極を接続したトポロジカルディラック半金属のホール磁気抵抗効果2020
- Author(s)
  小林浩二、野村健太郎
- Organizer
  日本物理学会2020年秋季大会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] トポロジカルディラック半金属における強磁性電極誘起ホール磁気抵抗効果2020
- Author(s)
  小林浩二、野村健太郎
- Organizer
  第139回金属材料研究所講演会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] 強磁性電極によるトポロジカルディラック半金属中の量子異常ホール効果2020
- Author(s)
  小林浩二、野村健太郎
- Organizer
  日本物理学会第75回年次大会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] ワイル半金属中のランダムな磁区による磁気抵抗効果2019
- Author(s)
  小林浩二、野村健太郎
- Organizer
  日本物理学会2019年秋季大会
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] Robust magnetoresistance in disordered quantum anomalous Hall Kagome layers2019
- Author(s)
  K. Kobayashi, M. Takagaki, K. Nomura
- Organizer
  International Conference on Topological Materials Science 2019 (TopoMat 2019)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14607
[Presentation] Robust magnetotransport in disordered quantum anomalous Hall Kagome layers2019
- Author(s)
  K. Kobayashi, M. Takagaki, K. Nomura
- Organizer
  Summit of Materials Science 2019: SMS2019
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14607

1. NOMURA Kentaro

# of Collaborated Projects: 0 results

# of Collaborated Products: 3 results
2. 是常隆

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
3. 小沢耀弘

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results

Kobayashi Koji 小林 浩二

Research Projects

Research Products

Co-Researchers

Numerical study on critical properties of topological quantum systems with broken translational symmetryPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Numerical study of critical phenomena in disordered topological quantum systemsPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

[Journal Article] Effective Model Analysis of Intrinsic Spin Hall Effect with Magnetism in the Stacked Kagome Weyl Semimetal Co3Sn2S22024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Effective Tight-Binding Model of Compensated Ferrimagnetic Weyl Semimetal with Spontaneous Orbital Magnetization2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Intrinsic and Extrinsic Anomalous Hall Effects in Disordered Magnetic Weyl Semimetal2022

Author(s)

Journal Title

DOI

NAID

Data Source

[Journal Article] Magnetic Orderings from Spin-Orbit Coupled Electrons on Kagome Lattice2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Wannier-based implementation of the coherent potential approximation with applications to Fe-based transition metal alloys2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Quantum Hall effect induced by chiral Landau levels in topological semimetal films2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Ferromagnetic-electrodes-induced Hall effect in topological Dirac semimetals2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Ballistic transport in disordered Dirac and Weyl semimetals2020

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Robust magnetotransport in disordered ferromagnetic kagome layers with quantum anomalous Hall effect2019

Author(s)

Journal Title

DOI

Data Source

[Presentation] フェリ磁性ワイル半金属の有効強束縛模型を用いたスピン軌道トルクの計算および解析2024

Author(s)

Organizer

Data Source

[Presentation] Controllable anomalous Hall effect in topological Dirac semimetals2024

Author(s)

Organizer

Data Source

[Presentation] 機械学習による乱れた電子系の相図決定手法の改良：波動関数のプーリング2024

Author(s)

Organizer

Data Source

[Presentation] 乱れたトポロジカル量子系の相図決定手法の改良：Transformerとpooling2024

Author(s)

Organizer

Data Source

[Presentation] カゴメ層状強磁性ワイル半金属Co3Sn2S2薄膜におけるホール伝導度の数値計算2023

Author(s)

Kobayashi Koji 小林浩二

[Presentation] トポロジカルDiracメモリスタ　-ニューロモルフィックコンピュータに向けて-2023