Observation of topological electronic structure in quasi-1D superconductor TaSe<sub>3</sub>

Bulletin of the American Physical Society

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APS March Meeting 2021

Volume 66, Number 1

Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA

Session C52: Topological Superconductivity: 2D Materials and Heterostructures

3:00 PM–6:00 PM, Monday, March 15, 2021

Sponsoring Unit: DMP
Chair: Anand Bhattacharya, Argonne National Laboratory

Abstract: C52.00009 : Observation of topological electronic structure in quasi-1D superconductor TaSe₃

5:24 PM–5:36 PM Live

Abstract

Presenter:

Zhongkai Liu
(ShanghaiTech University)

Authors:

Zhongkai Liu
(ShanghaiTech University)

Cheng Chen
(ShanghaiTech University)

Aiji Liang
(ShanghaiTech University)

Shuai Liu
(ShanghaiTech University)

Si-Min Nie
(Stanford University)

Junwei Huang
(Nanjing University)

Meixiao Wang
(ShanghaiTech University)

Yiwei Li
(Unviersity of Oxford)

Ding Pei
(Unviersity of Oxford)

Haifeng Yang
(ShanghaiTech University)

Hui-Jun Zheng
(ShanghaiTech University)

yong zhang
(ShanghaiTech University)

Donghui Lu
(SLAC National Accelerator Laboratory,)

Makoto Hashimoto
(SLAC National Accelerator Laboratory,)

Alexei Barinov
(Elettra Sincrotrone)

Chris Jozwiak
(Advanced Light Source)

Aaron Bostwick
(Advanced Light Source)

Eli Rotenberg
(Advanced Light Source)

Xufeng Kou
(ShanghaiTech University)

Lexian Yang
(Tsinghua University)

Yanfeng Guo
(ShanghaiTech University)

Zhijun Wang
(Chinese Academy of Sciences)

Hongtao Yuan
(Nanjing University)

Yulin Chen
(Unviersity of Oxford)

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. Up to date, only a few compounds have been proposed as candidates of intrinsic TSCs, such as doped topological insulator Cu_xBi₂Se₃ and iron-based superconductor FeTe_0.55Se_0.45. Here, by carrying out synchrotron and laser based angle-resolved photoemission spectroscopy (ARPES), we systematically investigated the electronic structure of a quasi-1D superconductor TaSe₃, and identified the nontrivial topological surface states. In addition, our scanning tunneling microscopy (STM) 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, therefore a great platform for the study of rich novel phenomena and application potentials.

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Bulletin of the American Physical Society

APS March Meeting 2021

Volume 66, Number 1

Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA

Session C52: Topological Superconductivity: 2D Materials and Heterostructures

Abstract: C52.00009 : Observation of topological electronic structure in quasi-1D superconductor TaSe3

Presenter:

Authors:

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Abstract: C52.00009 : Observation of topological electronic structure in quasi-1D superconductor TaSe₃