Giant spin-splitting and tunable spin-momentum locked transport in room temperature collinear antiferromagnetic semimetallic CrO monolayer

Chen，Xin1,2; Wang，Duo2,3; Li，Linyang4; Sanyal，Biplab2

2023-07-10

10.1063/5.0147450

Applied Physics Letters   Impact Factor & Quartile

0003-6951

1077-3118

In this work, we present theoretical predictions of a two-dimensional collinear antiferromagnetic semimetal, CrO, which exhibits a giant spin-split band structure, spin-momentum locked transport properties, and a high Néel temperature. Specifically, CrO features two pairs of spin-polarized anisotropic Weyl points at the Fermi level. By manipulating the position of these Weyl points with strain, we demonstrate that four different antiferromagnetic spintronic states with zero net magnetic moments can be achieved, including semimetals with two spin-polarized transport channels, half-semimetals, semiconductors with two spin-polarized transport channels, and half-semiconductors. The strain-induced semiconducting state also preserves the ultra-high carrier mobility of Weyl points, and the bandgap can be easily tuned. These findings offer a good avenue in spintronics without net magnetic moment or strong spin-orbit coupling and could lead to the development of antiferromagnetic materials for spintronic applications.

SCI

English

NI Journal Papers ; NI论文

First

Swedish Research Links programme[2022-04309] ; Carl Tryggers Stiftelse[CTS 20:378] ; Swedish Research Council[12004097] ; National Natural Science Foundation of China[A2020202031] ; Swedish Research Links programme by the Swedish Research Council[SNIC 2022/3-30] ; null[2018-05973] ; null[2017-05447] ; null[RP/FCA-03/2023] ; Swedish Research Council[2022-04309]

Physics

Physics, Applied

WOS:001027294400001

AIP Publishing

PHYSICS

2-s2.0-85165311053

Scopus

1.Department of Physics,Shenzhen Institute for Quantum Science & Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Department of Physics and Astronomy,Uppsala University,Uppsala,Box 516,751 20,Sweden
3.Faculty of Applied Sciences,Macao Polytechnic University,SAR,999078,Macao
4.School of Science,Hebei University of Technology,Tianjin,300401,China

Chen，Xin,Wang，Duo,Li，Linyang,et al. Giant spin-splitting and tunable spin-momentum locked transport in room temperature collinear antiferromagnetic semimetallic CrO monolayer[J]. Applied Physics Letters,2023,123(2).

Chen，Xin,Wang，Duo,Li，Linyang,&Sanyal，Biplab.(2023).Giant spin-splitting and tunable spin-momentum locked transport in room temperature collinear antiferromagnetic semimetallic CrO monolayer.Applied Physics Letters,123(2).

Chen，Xin,et al."Giant spin-splitting and tunable spin-momentum locked transport in room temperature collinear antiferromagnetic semimetallic CrO monolayer".Applied Physics Letters 123.2(2023).