中文版 | English
Title

Topological superconductivity in Janus monolayer transition metal dichalcogenides

Author
Corresponding AuthorYu, Zuo-Dong; Chen, Wei-Peng
Publication Years
2022-11-01
DOI
Source Title
ISSN
1674-1056
EISSN
2058-3834
Volume31Issue:11
Abstract
The Janus monolayer transition metal dichalcogenides (TMDs) MXY (M = Mo, W, etc. and X, Y = S, Se, etc.) have been successfully synthesized in recent years. The Rashba spin splitting in these compounds arises due to the breaking of out-of-plane mirror symmetry. Here we study the pairing symmetry of superconducting Janus monolayer TMDs within the weak-coupling framework near critical temperature T (c), of which the Fermi surface (FS) sheets centered around both Gamma and K (K ') points. We find that the strong Rashba splitting produces two kinds of topological superconducting states which differ from that in its parent compounds. More specifically, at relatively high chemical potentials, we obtain a time-reversal invariant s + f + p-wave mixed superconducting state, which is fully gapped and topologically nontrivial, i.e., a DOUBLE-STRUCK CAPITAL Z(2) topological state. On the other hand, a time-reversal symmetry breaking d + p + f-wave superconducting state appears at lower chemical potentials. This state possess a large Chern number |C| = 6 at appropriate pairing strength, demonstrating its nontrivial band topology. Our results suggest the Janus monolayer TMDs to be a promising candidate for the intrinsic helical and chiral topological superconductors.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Corresponding
Funding Project
[11904155]
WOS Research Area
Physics
WOS Subject
Physics, Multidisciplinary
WOS Accession No
WOS:000880114300001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/412162
DepartmentInstitute for Quantum Science and Engineering
Affiliation
1.Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
2.Zhejiang Gongshang Univ, Sch Informat & Elect Engn, Hangzhou 310018, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
4.Zhejiang Normal Univ, Ctr Stat & Theoret Condensed Matter Phys, Jinhua 321004, Peoples R China
5.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
Corresponding Author AffilicationInstitute for Quantum Science and Engineering
Recommended Citation
GB/T 7714
Li, Xian-Dong,Yu, Zuo-Dong,Chen, Wei-Peng,et al. Topological superconductivity in Janus monolayer transition metal dichalcogenides[J]. Chinese Physics B,2022,31(11).
APA
Li, Xian-Dong,Yu, Zuo-Dong,Chen, Wei-Peng,&Gong, Chang-De.(2022).Topological superconductivity in Janus monolayer transition metal dichalcogenides.Chinese Physics B,31(11).
MLA
Li, Xian-Dong,et al."Topological superconductivity in Janus monolayer transition metal dichalcogenides".Chinese Physics B 31.11(2022).
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