Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators

doi:10.1088/1674-1056/28/4/047301

中国物理B ›› 2019, Vol. 28 ›› Issue (4): 47301-047301.doi: 10.1088/1674-1056/28/4/047301

所属专题： SPECIAL TOPIC — Topological semimetals

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators

Junwei Liu(刘军伟), Chen Fang(方辰), Liang Fu(傅亮)

1 Department of Physics, Hong Kong University of Science and Technology(HKUST), Clear Water Bay, Hong Kong, China;
2 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

收稿日期:2019-01-04 修回日期:2019-02-20 出版日期:2019-04-05 发布日期:2019-04-05
通讯作者: Junwei Liu E-mail:liuj@ust.hk
基金资助:
Project supported by the MRSEC Program of the National Natural Science Foundation of China (Grant No. DMR-1419807) and the Start Up Funding from HKUST and the National Thousand-Yong-Talents Program of China.

Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators

Junwei Liu(刘军伟)^1,3, Chen Fang(方辰)², Liang Fu(傅亮)³

1 Department of Physics, Hong Kong University of Science and Technology(HKUST), Clear Water Bay, Hong Kong, China;
2 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

Received:2019-01-04 Revised:2019-02-20 Online:2019-04-05 Published:2019-04-05
Contact: Junwei Liu E-mail:liuj@ust.hk
Supported by:
Project supported by the MRSEC Program of the National Natural Science Foundation of China (Grant No. DMR-1419807) and the Start Up Funding from HKUST and the National Thousand-Yong-Talents Program of China.

摘要/Abstract

摘要：

Based on k·p analysis and realistic tight-binding calculations, we find that time-reversal-breaking Weyl semimetals can be realized in magnetically-doped (Mn, Eu, Cr, etc.) Sn_1-xPb_x(Te, Se) class of topological crystalline insulators. All the Weyl points are well separated in momentum space and possess nearly the same energy due to high crystalline symmetry. Moreover, both the Weyl points and Fermi arcs are highly tunable by varying Pb/Sn composition, pressure, magnetization, temperature, surface potential, etc., opening up the possibility of manipulating Weyl points and rewiring the Fermi arcs.

关键词: topological crystalline insulator, magnetic Weyl semimetal, magnetically-doped Sn_1-xPb_x(Te,Se), Fermi arc

Abstract:

Key words: topological crystalline insulator, magnetic Weyl semimetal, magnetically-doped Sn_1-xPb_x(Te,Se), Fermi arc

中图分类号: (Surface states, band structure, electron density of states)

73.20.At

75.50.Pp (Magnetic semiconductors) 71.20.-b (Electron density of states and band structure of crystalline solids) 73.43.-f (Quantum Hall effects)

刘军伟, 方辰, 傅亮. Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators[J]. 中国物理B, 2019, 28(4): 47301-047301.

Junwei Liu(刘军伟), Chen Fang(方辰), Liang Fu(傅亮). Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators[J]. Chin. Phys. B, 2019, 28(4): 47301-047301.

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Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators

Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators

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