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In-plane magnetization-induced quantum anomalous Hall effect in atomic crystals of group-V elements

Peichen Zhong, Yafei Ren, Yulei Han, Liyuan Zhang, and Zhenhua Qiao
Phys. Rev. B 96, 241103(R) – Published 14 December 2017
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Abstract

We theoretically demonstrate that the in-plane magnetization-induced quantum anomalous Hall effect (QAHE) can be realized in the atomic crystal layers of group-V elements with a buckled honeycomb lattice. Based on sp3 tight-binding models with parameters being extracted from first-principles results, we show that for weak and strong spin-orbit couplings, the systems harbor QAHEs with Chern numbers of C=±1 and ±2, respectively. For C=±1 phases, we find the critical magnetization to realize QAHE can be extremely small by tuning the spin-orbit coupling strength. For C=±2 phases, we find that although the critical magnetization is larger, it can be decreased effectively by strain. Moreover, the band gap is large enough for a room-temperature observation. These features suggest that it is experimentally feasible to realize high-temperature QAHEs from in-plane magnetization in the atomic crystal layers of group-V elements.

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  • Received 6 June 2017
  • Revised 31 October 2017

DOI:https://doi.org/10.1103/PhysRevB.96.241103

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Peichen Zhong1,2, Yafei Ren1,2, Yulei Han1,2, Liyuan Zhang3,*, and Zhenhua Qiao1,2,†

  • 1ICQD, Hefei National Laboratory for Physical Sciences at Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 2CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 3Department of Physics, South University of Science and Technology of China, Shenzhen, Guangdong 518055, China

  • *Corresponding author: zhangly@sustc.edu.cn
  • Corresponding author: qiao@ustc.edu.cn

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Issue

Vol. 96, Iss. 24 — 15 December 2017

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