Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer 1T−VSe2

Huang, Angus; Chen, Chin-Hsuan; Chang, Ching-Hao; Jeng, Horng-Tay

doi:10.3390/nano11081998

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Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer $1 T - V {Se}_{2}$

¹

Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan

²

Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan

³

Physics Division, National Center for Theoretical Sciences, Hsinchu 30013, Taiwan

⁴

Institute of Physics, Academia Sinica, Taipei 11529, Taiwan

^*

Author to whom correspondence should be addressed.

Nanomaterials 2021, 11(8), 1998; https://doi.org/10.3390/nano11081998

Submission received: 31 May 2021 / Revised: 28 July 2021 / Accepted: 29 July 2021 / Published: 4 August 2021

(This article belongs to the Special Issue Atomic-Scale Properties of Magnetic Surfaces, Interfaces, and Nanostructures)

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Abstract

Magnetic two-dimensional (2D) van der Waals materials have attracted tremendous attention because of their high potential in spintronics. In particular, the quantum anomalous Hall (QAH) effect in magnetic 2D layers shows a very promising prospect for hosting Majorana zero modes at the topologically protected edge states in proximity to superconductors. However, the QAH effect has not yet been experimentally realized in monolayer systems to date. In this work, we study the electronic structures and topological properties of the 2D ferromagnetic transition-metal dichalcogenides (TMD) monolayer

1 T - V {Se}_{2}

by first-principles calculations with the Heyd–Scuseria–Ernzerhof (HSE) functional. We find that the spin-orbit coupling (SOC) opens a continuous band gap at the magnetic Weyl-like crossing point hosting the quantum anomalous Hall effect with Chern number

C = 2

. Moreover, we demonstrate the topologically protected edge states and intrinsic (spin) Hall conductivity in this magnetic 2D TMD system. Our results indicate that

1 T - V {Se}_{2}

monolayer serves as a stoichiometric quantum anomalous Hall material.

Keywords: 2D materials; magnetic materials; quantum anomalous Hall effect; transition-metal dichalcogenides

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MDPI and ACS Style

Huang, A.; Chen, C.-H.; Chang, C.-H.; Jeng, H.-T. Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer $1 T - V {Se}_{2}$ . Nanomaterials 2021, 11, 1998. https://doi.org/10.3390/nano11081998

AMA Style

Huang A, Chen C-H, Chang C-H, Jeng H-T. Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer $1 T - V {Se}_{2}$ . Nanomaterials. 2021; 11(8):1998. https://doi.org/10.3390/nano11081998

Chicago/Turabian Style

Huang, Angus, Chin-Hsuan Chen, Ching-Hao Chang, and Horng-Tay Jeng. 2021. "Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer $1 T - V {Se}_{2}$ " Nanomaterials 11, no. 8: 1998. https://doi.org/10.3390/nano11081998

APA Style

Huang, A., Chen, C.-H., Chang, C.-H., & Jeng, H.-T. (2021). Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer $1 T - V {Se}_{2}$ . Nanomaterials, 11(8), 1998. https://doi.org/10.3390/nano11081998

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Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer $1 T - V {Se}_{2}$

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