Weyl semimetal states in transition metal monochalcogenide superlattices AX/BX (A, B = Cr, Mo, W, A ≠ B; X = Se, Te)
-
Published:2022-06-06
Issue:33
Volume:55
Page:335304
-
ISSN:0022-3727
-
Container-title:Journal of Physics D: Applied Physics
-
language:
-
Short-container-title:J. Phys. D: Appl. Phys.
Author:
Zhao X MORCID,
Li Y ZORCID,
Zhao L LORCID,
Dai T AORCID,
Zhong J XORCID,
Meng L JORCID
Abstract
Abstract
Based on first-principles calculations and the Wannier-function-based tight-binding method, we investigate the topological electronic properties of designed noncentrosymmetric transition metal monochalcogenide superlattices AX/BX (A, B = Cr, Mo, W, A ≠ B; X = Se, Te). Here, we mainly consider time-reversal symmetry (TRS) MoTe/WTe and MoSe/WSe and TRS broken CrTe/WTe and CrTe/MoTe, which are the Weyl and magnetic Weyl semimetals, respectively. The considered systems are nodal line semimetals with nodal lines on three mirror planes of the Brillouin zone of hexagonal lattice in the absence of spin–orbit coupling (SOC). When considering the SOC, each nodal line opens a gap except for some pairs of Weyl points (WPs) on the kz
≠ 0 planes and the number of WPs is material-dependent. We identify the termination-dependent Fermi arc connection patterns on the (001) and (00
1
ˉ
) surfaces for four Weyl semimetal superlattices AX/BX. These results provide a theoretical basis to realize the possible applications of these superlattice materials in future topological electronic devices.
Funder
Postgraduate Scientific Research Innovation Project of Hunan Province
a Key Project of Department of Hunan Province
Hunan Provincial Innovation Foundation for Postgraduate
National Natural Science Foundation of China
Natural Science Foundation of Hunan Province
Subject
Surfaces, Coatings and Films,Acoustics and Ultrasonics,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Reference45 articles.
1. Recent progress in the study of topological semimetals;Bernevig;J. Phys. Soc. Japan,2018
2. New method for high-accuracy determination of the fine-structure constant based on quantized hall resistance;Klitzing;Phys. Rev. Lett.,1980
3. Weyl and Dirac semimetals in three-dimensional solids;Armitage;Rev. Mod. Phys.,2018
4. An ab-initio study on structural,elastic, electronic, bonding, thermal, and optical properties of topological Weyl semimetal TaX (X = P, As);Naher;Nature,2021
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献