Ferromagnetic state above room temperature in a proximitized topological Dirac semimetal

Uchida Masaki; Koretsune Takashi; Sato Shin; Kriener Markus; Nakazawa Yusuke; Nishihaya Shinichi; Taguchi Yasujiro; Arita Ryotaro; Kawasaki Masashi

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Ferromagnetic state above room temperature in a proximitized topological Dirac semimetal

机译：在近型拓扑狄拉克半型半球上高于室温的铁磁状态

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We report an above-room-temperature ferromagnetic state realized in a proximitized Dirac semimetal, which is fabricated by growing typical Dirac semimetal Cd3As2 films on a ferromagnetic garnet with strong perpendicular magnetization. Observed anomalous Hall conductivity with substantially large Hall angles is found to be almost proportional to magnetization and opposite in sign to it. Theoretical calculations based on first-principles electronic structure also demonstrate that the Fermi-level dependent anomalous Hall conductivity reflects the Berry curvature originating in the split Weyl nodes. The present Dirac-semimetal/ferromagnetic-insulator heterostructure will provide a platform for exploring Weyl-node transport phenomena and spintronic functions lately proposed for topological semimetals.

机译：我们报告了在近端的Dirac半岩中实现的上述温度铁磁状态，通过在具有强垂直磁化强度的铁磁石榴石上生长典型的Dirac半型CD3As2薄膜来制造。观察到具有基本上大的霍尔角的异常霍尔电导率几乎与磁化和符号相对成比例。基于第一原理电子结构的理论计算还证明了FERMI级相关的异常霍尔电导率反映了源自分裂Weyl节点的浆果曲率。目前的Dirac-semimetal /铁磁 - 绝缘体异质结构将提供一个用于探索Weyl节点传输现象和最近提出用于拓扑半定态的旋转功能的平台。

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来源
《Physical review》 |2019年第24期|245148.1-245148.7|共7页
作者
Uchida Masaki; Koretsune Takashi; Sato Shin; Kriener Markus; Nakazawa Yusuke; Nishihaya Shinichi; Taguchi Yasujiro; Arita Ryotaro; Kawasaki Masashi;
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Univ Tokyo Dept Appl Phys Tokyo 1138656 Japan|Univ Tokyo QPEC Tokyo 1138656 Japan|Japan Sci & Technol Agcy JST PRESTO Tokyo 1020076 Japan;

Tohoku Univ Dept Phys Sendai Miyagi 9808578 Japan;

Univ Tokyo Dept Appl Phys Tokyo 1138656 Japan|Univ Tokyo QPEC Tokyo 1138656 Japan;

RIKEN CEMS Wako Saitama 3510198 Japan;

Univ Tokyo Dept Appl Phys Tokyo 1138656 Japan|Univ Tokyo QPEC Tokyo 1138656 Japan;

Univ Tokyo Dept Appl Phys Tokyo 1138656 Japan|Univ Tokyo QPEC Tokyo 1138656 Japan;

RIKEN CEMS Wako Saitama 3510198 Japan;

Univ Tokyo Dept Appl Phys Tokyo 1138656 Japan|Univ Tokyo QPEC Tokyo 1138656 Japan|RIKEN CEMS Wako Saitama 3510198 Japan;

Univ Tokyo Dept Appl Phys Tokyo 1138656 Japan|Univ Tokyo QPEC Tokyo 1138656 Japan|RIKEN CEMS Wako Saitama 3510198 Japan;

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1. Ferromagnetic state above room temperature in a proximitized topological Dirac semimetal [J] . Physical review, B . 2019,第24期

机译：在近型拓扑狄拉克半型半球上高于室温的铁磁状态
2. Semiconductor, topological semimetal, indirect semimetal, and topological Dirac semimetal phases of Ge_(1-x)Sn_x alloys [J] . H.-S. Lan, S. T. Chang, C. W. Liu Physical review. B, Condensed Matter And Materals Physics . 2017,第20期

机译：Ge_（1-x）Sn_x合金的半导体，拓扑半金属，间接半金属和拓扑Dirac半金属相
3. Semiconductor, topological semimetal, indirect semimetal, and topological Dirac semimetal phases of Ge1-xSnx alloys [J] . Lan H. -S., Chang S. T., Liu C. W. Physical review, B . 2017,第20期

机译：半导体，拓扑半决面，间接半型和GE1-Xsnx合金的拓扑狄拉克半阶段
4. Observation of breaking of Onsager’s reciprocal relation in a high spin Hall angle ferromagnetic Weyl semimetal at room temperature [C] . Livio Leiva, Simon Granville, Yao Zhang, 応用物理学会春季学術講演会;応用物理学会 . -1

机译：在室温下观察高旋转霍尔角铁磁纤维半型在高旋转霍尔角铁磁性威尔半岩中断的互敏关系
5. Synthesis, Transport, and Thermoelectric Studies of Topological Dirac Semimetal Cd3As2 for Room Temperature Waste Heat Recovery and Energy Conversion [D] . Hosseini, Tahereh A. 2017

机译：用于室温废热回收和能量转化的拓扑狄拉克半金属Cd3As2的合成，输运和热电研究
6. Giant room temperature anomalous Hall effect and tunable topology in a ferromagnetic topological semimetal Co2MnAl [O] . Peigang Li, Jahyun Koo, Wei Ning, -1

机译：铁磁拓扑半金属Co2MnAl中的巨大室温异常霍尔效应和可调谐拓扑
7. Semiconductor, topological semimetal, indirect semimetal, and topological Dirac semimetal phases of Ge$_{1-x}$Sn$_{x}$ alloys [O] . Lan, H. -S., Chang, S. T., Liu, C. W. 2017

机译：半导体，拓扑半金属，间接半金属，和 Ge $ _ {1-x} $ sn $ _ {x} $合金的拓扑Dirac半金属相

Ferromagnetic state above room temperature in a proximitized topological Dirac semimetal

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