Study of magnets hosting strongly correlated Dirac fermions
Project/Area Number |
16H06015
|
Research Category |
Grant-in-Aid for Young Scientists (A)
|
Allocation Type | Single-year Grants |
Research Field |
Condensed matter physics II
|
Research Institution | Osaka University |
Principal Investigator |
Sakai Hideaki 大阪大学, 理学研究科, 准教授 (20534598)
|
Project Period (FY) |
2016-04-01 – 2019-03-31
|
Project Status |
Completed (Fiscal Year 2018)
|
Budget Amount *help |
¥24,700,000 (Direct Cost: ¥19,000,000、Indirect Cost: ¥5,700,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2016: ¥20,670,000 (Direct Cost: ¥15,900,000、Indirect Cost: ¥4,770,000)
|
Keywords | ディラック電子 / 反強磁性体 / 量子ホール効果 / 磁気抵抗効果 / 中性子回折 / 局在スピン / g因子 / スピン分裂 / ディラック電子系 / ゼーベック効果 / ネルンスト効果 / トポロジカル磁性体 / 巨大磁気抵抗 / ディラク電子系 / ワイル半金属 / 強相関電子系 / 磁性 / スピンエレクトロニクス / 巨大磁気抵抗効果 / スピンフロップ |
Outline of Final Research Achievements |
In this research, we aimed to study the correlated quantum transport phenomena in a layered bulk magnet EuMnBi2 to reveal the fundamental physics of Dirac fermions coupled with magnetism. To show the variation of band structure upon the antiferromagnetism in EuMnBi2, we have first studied the Landau level splitting in a tilted magnetic field up to ~35 T and found effective g factor differs by ~50% between two antiferromagnetic phases, which reflects the strong exchange coupling with Eu spins as verified by first-principles calculations. We have also studied the details of field-tunable antiferromagnetic order of both Eu and Mn layers by the neutron diffraction and discussed its impact on the spin-flop-induced giant magnetoresistance effects in the present system.
|
Academic Significance and Societal Importance of the Research Achievements |
本研究により、多層ディラック電子系磁性体において磁性やスピンと結合した輸送特性だけでなく、ディラック電子の微視的なバンド構造が磁気秩序との強い結合により変調されることを半定量的に解明できた点は、トポロジカル物質における強相関効果として学術的に重要な上、今後の物質設計の基盤となる成果といえる。またブロック層を利用したディラック電子のキャリア濃度制御を実証できたことは、本物質系がエレクトロニクスや熱電変換を含めた幅広い応用展開が可能であることを示唆している。
|
Report
(4 results)
Research Products
(113 results)
-
-
-
-
-
-
[Journal Article] Quantitative evaluation of Dirac physics in PbTe2018
Author(s)
Kazuto Akiba, Atsushi Miyake, Hideaki Sakai, Keisuke Katayama, Hiroshi Murakawa, Noriaki Hanasaki, Sadao Takaoka, Yoshiki Nakanishi, Masahito Yoshizawa and Masashi Tokunaga
-
Journal Title
Phys. Rev. B
Volume: 98
Issue: 11
Pages: 115144-115144
DOI
Related Report
Peer Reviewed
-
-
[Journal Article] Nanoscale ice-type structural fluctuation in spinel titanetes2018
Author(s)
S. Torigoe, T. Hattori, K. Kodama, T. Honda, H. Sagayama, K. Ikeda, T. Otomo, H. Nitani, H. Abe, H. Murakawa, \underline{H. Sakai}, and N. Hanasaki
-
Journal Title
Phys. Rev. B
Volume: 98
Issue: 13
Pages: 134443-134443
DOI
Related Report
Peer Reviewed
-
[Journal Article] Negative-pressure-induced helimagnetism in ferromagnetic cubic perovskites Sr$_{1-x}$Ba$_{x}$CoO$_{3}$2018
Author(s)
H. Sakai, S. Yokoyama, A. Kuwabara, J. S. White, E. Canevet, H. M. Ronnow, T. Koretsune, R. Arita, A. Miyake, M. Tokunaga, Y. Tokura, and S. Ishiwata
-
Journal Title
Phys. Rev. Mater.
Volume: 2
Issue: 10
Pages: 104412-104412
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
-
-
-
[Journal Article] Lattice Dynamics of 1T'-MoTe2 Studied by Time-Resolved Transmission X-Ray Diffraction at SACLA2018
Author(s)
Takahiro SHIMOJIMA, Asuka NAKAMURA, Kyoko ISHIZAKA, Yoshikazu TANAKA, Kou TAKUBO, Yasuyuki HIRATA, Hiroki WADATI, Susumu YAMAMOTO, Iwao MATSUDA, Koji IKEURA, Hidefumi TAKAHASHI, Hideaki SAKAI, Shintaro ISHIWATA, Tadashi TOGASHI, Shigeki OWADA, Tetsuo KATAYAMA, Kensuke TONO, Makina YABASHI and Shik SHIN
-
Journal Title
Adv. X-Ray. Chem. Anal., Japan
Volume: 49
Pages: 163-168
Related Report
Peer Reviewed
-
-
[Journal Article] Observation of spin-polarized bands and domain-dependent Fermi arcs in polar Weyl semimetal MoTe22017
Author(s)
M. Sakano,M. S. Bahramy, H. Tsuji, Araya, K. Ikeura, H. Sakai, S. Ishiwata, K. Yaji, K. Kuroda, A. Harasawa, S. Shin, and K. Ishizaka
-
Journal Title
Phys. Rev. B
Volume: 95
Issue: 12
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] 角度分解光電子分光によるTaAsの電子構造2019
Author(s)
島岩泰暉, 密岡拓心, 村川寛, 駒田盛是, 横井滉平, 酒井英明, 花咲徳亮, 有田将司, E.F. Schwier, 島田賢也, 生天目博文, 溝川貴司
Organizer
日本物理学会第74回年次大会
Related Report
-
-
[Presentation] p型/n型SnSeにおける外部圧力を利用したバレー構造と熱電特性の制御2019
Author(s)
西村拓也, 酒井英明, 森仁志, 秋葉和人, 臼井秀知, 越智正之, 黒木和彦, 三宅厚志, 徳永将史, 上床美也, 片山敬介, 坂本拓也, 村川寛, 花咲徳亮
Organizer
日本物理学会第74回年次大会
Related Report
-
-
-
-
-
-
[Presentation] 外部圧力によるSnSeのリフシッツ転移と熱電性能の向上2018
Author(s)
西村拓也, 酒井英明, 森仁志, 秋葉和人, 三宅厚志, 徳永将史, 上床美也, 臼井秀智, 越智正之, 黒木和彦, 片山敬介, 村川寛, 花咲徳亮
Organizer
第3回固体化学フォーラム研究会
Related Report
-
-
-
-
-
[Presentation] PbTeにおける``Diracness"の評価とその圧力依存性2018
Author(s)
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
Organizer
日本物理学会2018年度秋季大会
Related Report
-
-
-
-
-
[Presentation] 角度分解光電子分光で観測されたTaAsのTa終端における電子構造2018
Author(s)
密岡拓心, 岡本陽平, 溝川貴司, 村川寛, 駒田盛是, 横井滉平, 酒井英明, 花咲徳亮, E.F.Schwier, 島田賢也, 生天目博文
Organizer
日本物理学会2018年度秋季大会
Related Report
-
-
[Presentation] Quantitative Evaluation of ”Diracness” from the Quantum Oscillations in PbTe2018
Author(s)
K. Akiba, A. Miyake, H. Sakai, K. Katayama, T. Sakamoto, N. Hanasaki, S. Takaoka, Y. Nakanishi, M. Yoshizawa, Y. Uwatoko, and M. Tokunaga
Organizer
"APS March Meeting 2018
Related Report
-
-
-
[Presentation] TaAs のTa 終端表面の電子構造2018
Author(s)
密岡拓心, 岡本陽平, 溝川貴司, 村川寛, 駒田盛是, 横井滉平, 酒井英明, 花咲徳亮, E.F.Schwier, 島田賢也, 生天目博文
Organizer
日本物理学会第73 回年次大会
Related Report
-
-
-
[Presentation] 反強磁性秩序をもつ多層ディラック電子系EuMnBi2の電子構造の研究2018
Author(s)
深田和宏, 増田英俊, 坂野昌人, 黒田健太, 原沢あゆみ, 矢治光一郎, 近藤猛, 辛埴, 酒井英明, 石渡晋太郎, 石坂香子
Organizer
日本物理学会第73 回年次大会
Related Report
-
-
-
[Presentation] Pb1-xSnxTe の強磁場物性2017
Author(s)
秋葉和人, 三宅厚志, 酒井英明, 片山敬介, 坂本拓也, 花咲徳亮, 鷹岡貞夫, 中西良樹, 吉澤正人, 徳永将史
Organizer
日本物理学会第72 回年次大会
Place of Presentation
大阪大学
Year and Date
2017-03-17
Related Report
-
-
-
-
-
-
-
-
-
[Presentation] スピネル型酸化物MgTi2O4における,相転移近傍のナノスケール構造揺らぎ2017
Author(s)
鳥越秀平, 服部崇幸, 樹神克明, 本田孝志, 仁谷浩明, 阿部仁, 佐賀山基, 池田一貴, 大友季哉, 村川寛, 酒井英明, 花咲徳亮
Organizer
日本物理学会第72 回年次大会
Place of Presentation
大阪大学
Year and Date
2017-03-17
Related Report
-
[Presentation] 擬1次元Cu-O鎖をもつ新規ペロブスカイトPrCuO$_3$に対するLa置換効果および圧力効果2017
Author(s)
伊藤雅春, 高橋英史, 藤岡淳, 酒井英明, 佐賀山基, 山崎裕一, 草野圭弘, 横山優一, 田久保耕, 平田靖透, 和達大樹, 寺倉千恵子, 越智正之, 酒井志朗, 有田亮太郎, 十倉好紀, 石渡晋太郎
Organizer
日本物理学会第72 回年次大会
Place of Presentation
大阪大学
Year and Date
2017-03-17
Related Report
-
[Presentation] Observation of quantized Hall plateaus in a bulk antiferromagnet EuMnBi$_2$ with magnetically confined 2D Dirac fermions2017
Author(s)
H. Masuda, H. Sakai, M. Tokunaga, Y. Yamasaki, A. Miyake, J. Shiogai, S. Nakamura, S. Awaji, A. Tsukazaki, H. Nakao, Y. Murakami, T. Arima, Y. Tokura, S. Ishiwata
Organizer
APS March Meeting 2017
Place of Presentation
New Orleans, USA
Year and Date
2017-03-13
Related Report
Int'l Joint Research
-
-
-
-
-
-
[Presentation] Dirac fermion transport coupled with magnetic order in a layered antiferromagnet EuMnBi22017
Author(s)
Hidetoshi MASUDA, Hideaki SAKAI, Masashi TOKUNAGA, Yuichi YAMASAKI, Atsushi MIYAKE, Junichi SHIOGAI, Shintaro NAKAMURA, Satoshi AWAJI, Atsushi TSUKAZAKI, Hironori NAKAO, Youichi MURAKAMI, Taka-hisa ARIMA, Yoshinori TOKURA,and Shintaro ISHIWATA
Organizer
The International Conference on Strongly Correlated Electron Systems 2017 (SCES2017)
Related Report
-
[Presentation] The evaluation of Diracness in Pb1-xSnxTe from the quantum oscillation phenomena in magnetic fields2017
Author(s)
K. Akiba, A. Miyake, H. Sakai, K. Katayama, T. Sakamoto, N. Hanasaki, S. Takaoka, Y. Nakanishi, M. Yoshizawa, Y. Uwatoko, M. Tokunaga
Organizer
The International Conference on Strongly Correlated Electron Systems 2017 (SCES2017)
Related Report
-
-
-
-
-
-
-
-
-
-
[Presentation] Quantum Transport of Dirac Fermion Coupled with Magnetic Order in a Layered Antiferromagnet EuMnBi22017
Author(s)
"H. Masuda, H. Sakai, M. Tokunaga, Y. Yamasaki, A. Miyake, J. Shiogai, S. Nakamura, S. Awaji, A. Tsukazaki, H. Nakao, Y. Murakami, T. Arima, Y. Tokura, and S. Ishiwata "
Organizer
Kanamori Memorial International Symposium
Related Report
-
-
[Presentation] High pressure synthesis of perovskite-type cuprate with quasi-one-dimensional Cu-O chains2017
Author(s)
H. Takahashi, M. Ito, J. Fujioka, H. Sakai, M. Ochi, S. Sakai, R. Arita, H. Sagayama, Y. Yamasaki, Y. Yokoyama, H. Wadati, Y. Kusano, Y. Tokura and S. Ishiwata
Organizer
Kanamori Memorial International Symposium
Related Report
-
-
-
[Presentation] High pressure synthesis of perovskite-type cuprate with quasi-one-dimensional Cu-O chains2017
Author(s)
H. Takahashi, M. Ito, J. Fujioka, H. Sakai, M. Ochi, S. Sakai, R. Arita, H. Sagayama, Y. Yamasaki, Y. Yokoyama, H. Wadati, Y. Kusano, Y. Tokura, and S. Ishiwata
Organizer
The 6th Toyota RIKEN International Workshop
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] SACLAを用いて観測した$\beta$-MoTe$_2$の超高速格子ダイナミクス2016
Author(s)
中村飛鳥, 下志万貴博, 石坂香子, 田久保耕, 平田靖透, 和達大樹, 山本達, 松田巌, 田中良和, 辛埴, 池浦晃至, 酒井英明, 石渡晋太郎, 富樫格, 大和田成起, 片山哲夫, 登野健介, 矢橋牧名
Organizer
日本物理学会2016年秋季大会
Place of Presentation
金沢大学
Year and Date
2016-09-13
Related Report
-
-
[Presentation] Observation of quantized Hall plateaus in a bulk antiferromagnet EuMnBi$_2$ with magnetically confined 2D Dirac fermions2016
Author(s)
H. Masuda, ○H. Sakai, M. Tokunaga, Y. Yamasaki, A. Miyake, J. Shiogai, S. Nakamura, S. Awaji, A. Tsukazaki, H. Nakao, Y. Murakami, T. Arima, Y. Tokura, and S. Ishiwata
Organizer
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS 9)
Place of Presentation
神戸国際会議場
Year and Date
2016-08-08
Related Report
Int'l Joint Research
-
-
-
-
-
-