Observation of topological superconductivity in a stoichiometric transition metal dichalcogenide 2M-WS2
Name
s41467-021-23076-1.pdf
Description
Published version
Size
1.83 MB
Format
Adobe PDF
Checksum (MD5)
e65c2afbec25e840f10fc26ab3f823c3
Author(s)
Date Issued
2021
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Li, YW, Zheng, HJ, Fang, YQ, Zhang, DQ, Chen, YJ et al. 2021. "Observation of topological superconductivity in a stoichiometric transition metal dichalcogenide 2M-WS2." Nature Communications, 12 (1).
Version
Final published version
Abstract
AbstractTopological superconductors (TSCs) are unconventional superconductors with bulk superconducting gap and in-gap Majorana states on the boundary that may be used as topological qubits for quantum computation. Despite their importance in both fundamental research and applications, natural TSCs are very rare. Here, combining state of the art synchrotron and laser-based angle-resolved photoemission spectroscopy, we investigated a stoichiometric transition metal dichalcogenide (TMD), 2M-WS2 with a superconducting transition temperature of 8.8 K (the highest among all TMDs in the natural form up to date) and observed distinctive topological surface states (TSSs). Furthermore, in the superconducting state, we found that the TSSs acquired a nodeless superconducting gap with similar magnitude as that of the bulk states. These discoveries not only evidence 2M-WS2 as an intrinsic TSC without the need of sensitive composition tuning or sophisticated heterostructures fabrication, but also provide an ideal platform for device applications thanks to its van der Waals layered structure.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1038/S41467-021-23076-1
