Current-driven dynamics of non-collinear antiferromagnetic spin structures for functional spintronic devices

用于功能自旋电子器件的非共线反铁磁自旋结构的电流驱动动力学

• 批准号: 20K15155
• 负责人: DUTTAGUPTA SAMIK
• 金额: $ 2.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K15155/
• 关键词: Antiferromagnet; Topology; Weyl semimetal; AFM Spintronics; AFM spintronics; Weyl semimetals; Band structure topology; Non collinear

The concerted effort of relativistic spin-orbit interaction, electronic band topology and magnetic order in antiferromagnetic Weyl semimetals (WSM-AFMs) manifests itself in novel properties, crucial for development of antiferromagnetic spintronics. We quantified magnetotransport properties of polycrystalline and epitaxial WSM-AFM/heavy-metal structures which revealed signatures of chiral anomaly in condensed matter systems. We utilized anomalous Nernst effect for different crystallographic orientations (C and M-plane) of the epitaxial structure. Our observations show an electronic route towards characterization of topological nature of electronic bands in Weyl semimetals.

反铁磁外尔半金属（WSM-AFM）中相对论自旋轨道相互作用、电子能带拓扑和磁序的共同努力体现在新的特性上，这对于反铁磁自旋电子学的发展至关重要。我们量化了多晶和外延 WSM-AFM/重金属结构的磁输运特性，揭示了凝聚态物质系统中手性异常的特征。我们利用反常能斯特效应来描述外延结构的不同晶体取向（C 和 M 平面）。我们的观察显示了表征外尔半金属电子带拓扑性质的电子途径。

项目成果

Unconventional Hall effect and its modification in 2D van der Waals Fe3GeTe2

二维范德华 Fe3GeTe2 中的非常规霍尔效应及其修正

• 发表时间: 2021
• 作者: R. Roy Chowdhury;S. DuttaGupta;C. Patra;Oleg A. Tretiakov;S. Sharma;S. Fukami;H. Ohno and R. P. Singh
• 通讯作者: H. Ohno and R. P. Singh

Modification of topological Hall effect with Co-doping in the uniaxial van der Waals ferromagnet (CoxFe1-x)3GeTe2

单轴范德华铁磁体 (CoxFe1-x)3GeTe2 中共掺杂对拓扑霍尔效应的修改

• 发表时间: 2021
• 作者: R. Roy Chowdhury;S. DuttaGupta;C. Patra;S. Sharma;S. Fukami;H. Ohno and R. P. Singh
• 通讯作者: H. Ohno and R. P. Singh

Metallic Antiferromagnetic Spintronics

金属反铁磁自旋电子学

• 发表时间: 2021
• 作者: Ke Tang;Yong-Chang Lau;Kenji Nawa;Zhenchao Wen;Qingyi Xiang;Hiroaki Sukegawa;Takeshi Seki;Yoshio Miura;Koki Takanashi;and Seiji Mitani;Samik DuttaGupta
• 通讯作者: Samik DuttaGupta

Properties and Functionalities of Non-Collinear Antiferromagnetic Mn3+xSnx Thin Films

非共线反铁磁 Mn3 xSnx 薄膜的特性和功能

• 发表时间: 2021
• 作者: J.-Y. Yoon;Y. Takeuchi;Y. Yamane;R. Itoh;S. DuttaGupta;B. Jinnai;S. Kanai;J. Ieda;H. Ohno and S. Fukami
• 通讯作者: H. Ohno and S. Fukami

Observation of domain structure in non-collinear antiferromagnetic Mn3Sn thin films by magneto-optical Kerr effect

利用磁光克尔效应观察非共线反铁磁Mn3Sn薄膜中的磁畴结构

• 发表时间: 2022
• 期刊: Applied Physics Letters (accepted)
• 作者: Tomohiro Uchimura;Ju-Young Yoon;Yuma Sato;Yutaro Takeuchi;Shun Kanai;Ryota Takechi;Keisuke Kishi;Yuta Yamane;Samik DuttaGupta;Jun’ichi Ieda; Hideo Ohno;and Shunsuke Fukami
• 通讯作者: and Shunsuke Fukami