Tunable Weyl fermions and Fermi arcs in magnetized topological crystalline insulators

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

Abstract

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.

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

Received: 04 January 2019
Revised: 20 February 2019
Accepted manuscript online:

PACS:	73.20.At	(Surface states, band structure, electron density of states)
	75.50.Pp	(Magnetic semiconductors)
	71.20.-b	(Electron density of states and band structure of crystalline solids)
	73.43.-f	(Quantum Hall effects)

Fund:

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.

Corresponding Authors: Junwei Liu
E-mail: liuj@ust.hk

Cite this article:

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

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