Magnetic Weyl semimetal phase in a Kagome crystal

被引：662

作者：

Liu, D. F. ^{[1
,2
]}

Liang, A. J. ^{[2
,3
,4
]}

Liu, E. K. ^{[5
,6
]}

Xu, Q. N. ^{[5
]}

Li, Y. W. ^{[7
]}

Chen, C. ^{[2
,3
,7
]}

Pei, D. ^{[7
]}

Shi, W. J. ^{[2
]}

Mo, S. K. ^{[4
]}

Dudin, P. ^{[8
]}

Kim, T. ^{[8
]}

Cacho, C. ^{[8
]}

Li, G. ^{[2
,3
]}

Sun, Y. ^{[5
]}

Yang, L. X. ^{[9
,10
]}

Liu, Z. K. ^{[2
,3
]}

Parkin, S. S. P. ^{[1
]}

Felser, C. ^{[5
,11
,12
]}

Chen, Y. L. ^{[2
,3
,7
,9
,10
]}

机构：

[1] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[2] Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[3] ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China

[4] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[6] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[7] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[8] Diamond Light Source, Didcot OX11 0DE, Oxon, England

[9] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[10] Tsinghua Univ, Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China

[11] Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[12] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

SCIENCE | 2019年 / 365卷 / 6459期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

TOPOLOGICAL INSULATORS; ELECTRONIC-STRUCTURES; FERMION SEMIMETAL;

D O I：

10.1126/science.aav2873

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：

Weyl semimetals are crystalline solids that host emergent relativistic Weyl fermions and have characteristic surface Fermi-arcs in their electronic structure. Weyl semimetals with broken time reversal symmetry are difficult to identify unambiguously. In this work, using angle-resolved photoemission spectroscopy, we visualized the electronic structure of the ferromagnetic crystal Co3Sn2S2 and discovered its characteristic surface Fermi-arcs and linear bulk band dispersions across the Weyl points. These results establish Co3Sn2S2 as a magnetic Weyl semimetal that may serve as a platform for realizing phenomena such as chiral magnetic effects, unusually large anomalous Hall effect and quantum anomalous Hall effect.

引用

页码：1282 / +

页数：26

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