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Title: Observation of Topological Electronic Structure in Quasi-1D Superconductor TaSe3

Journal Article · · Matter (Online)

Topological superconductors (TSCs), with the capability to host Majorana bound states that can lead to non-Abelian statistics and application in quantum computation, have been one of the most intensively studied topics in condensed matter physics recently. To date, only a few compounds have been proposed as candidates of intrinsic TSCs, such as doped topological insulator CuxBi2Se3 and iron-based superconductor FeTe0.55Se0.45. In this work, by carrying out synchrotron- and laser-based angle-resolved photoemission spectroscopy, we systematically investigated the electronic structure of a quasi-one-dimensional superconductor TaSe3 and identified the non-trivial topological surface states. In addition, our scanning tunneling microscopy study revealed a clean cleaved surface with a persistent superconducting gap, proving it suitable for further investigation of potential Majorana modes. These results prove TaSe3 as a stoichiometric TSC candidate that is stable and exfoliable and therefore a promising platform for the study of rich novel phenomena and application potentials.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences (CAS); Engineering and Physical Sciences Research Council (EPSRC); Chinese Scholarship Council (CSC)
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515; 2017YFA0305400; 2018YFA0307000; 2017YFA0304600; XDA18010000; EP/M020517/1; 61874172; 11974395; XDB33000000; 11774190; 11874022; 11674229
OSTI ID:
1834222
Alternate ID(s):
OSTI ID: 1762225; OSTI ID: 1779173; OSTI ID: 1811201
Journal Information:
Matter (Online), Journal Name: Matter (Online) Vol. 3 Journal Issue: 6; ISSN 2590-2385
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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