Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn3X, X=Sn, Ge

被引：148

作者：

Chen, Taishi ^{[1
,2
]}

Tomita, Takahiro ^{[2
,3
]}

Minami, Susumu ^{[1
,4
,5
]}

Fu, Mingxuan ^{[1
,2
]}

Koretsune, Takashi ^{[6
]}

Kitatani, Motoharu ^{[4
]}

Muhammad, Ikhlas ^{[2
]}

Nishio-Hamane, Daisuke ^{[2
]}

Ishii, Rieko ^{[2
]}

Ishii, Fumiyuki ^{[4
,5
]}

Arita, Ryotaro ^{[3
,4
,7
]}

Nakatsuji, Satoru ^{[1
,2
,3
,8
,9
,10
]}

机构：

[1] Univ Tokyo, Dept Phys, Tokyo, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba, Japan

[3] Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama, Japan

[4] RIKEN, Ctr Emergent Matter Sci CEMS, Wako, Saitama, Japan

[5] Kanazawa Univ, Nanomat Res Inst, Kanazawa, Ishikawa, Japan

[6] Tohoku Univ, Dept Phys, Sendai, Miyagi, Japan

[7] Univ Tokyo, Dept Appl Phys, Tokyo, Japan

[8] Johns Hopkins Univ, Inst Quantum Matter, Baltimore, MD 21218 USA

[9] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[10] Univ Tokyo, Trans Scale Quantum Sci Inst, Tokyo, Japan

来源：

NATURE COMMUNICATIONS | 2021年 / 12卷 / 01期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

BERRY PHASE; DISCOVERY; WANNIER90; SEMIMETAL; TOOL;

D O I：

10.1038/s41467-020-20838-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The recent discoveries of strikingly large zero-field Hall and Nernst effects in antiferromagnets Mn3X (X=Sn, Ge) have brought the study of magnetic topological states to the forefront of condensed matter research and technological innovation. These effects are considered fingerprints of Weyl nodes residing near the Fermi energy, promoting Mn3X (X=Sn, Ge) as a fascinating platform to explore the elusive magnetic Weyl fermions. In this review, we provide recent updates on the insights drawn from experimental and theoretical studies of Mn3X (X=Sn, Ge) by combining previous reports with our new, comprehensive set of transport measurements of high-quality Mn3Sn and Mn3Ge single crystals. In particular, we report magnetotransport signatures specific to chiral anomalies in Mn3Ge and planar Hall effect in Mn3Sn, which have not yet been found in earlier studies. The results summarized here indicate the essential role of magnetic Weyl fermions in producing the large transverse responses in the absence of magnetization. The large anomalous Hall (AHE) and anomalous Nernst effects (ANE) in antiferromagnets Mn3Sn/Mn3Ge are considered fingerprints of Weyl nodes residing near the Fermi energy. Here, the authors review the results from previous studies combining with new transport measurements on Mn3Sn/Mn3Ge single crystals, suggesting the essential role of magnetic Weyl fermions in explaining the AHE and ANE.

引用

页数：14

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