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

被引：29

作者：

Chen, Cheng ^{[1
,2
,3
,14
]}

Liang, Aiji ^{[1
,2
,14
]}

Liu, Shuai ^{[1
,14
]}

Nie, Simin ^{[4
]}

Huang, Junwei ^{[5
]}

Wang, Meixiao ^{[1
,2
]}

Li, Yiwei ^{[1
,6
]}

Pei, Ding ^{[6
]}

Yang, Haifeng ^{[1
,2
]}

Zheng, Huijun ^{[1
]}

Zhang, Yong ^{[7
]}

Lu, Donghui ^{[8
]}

Hashimoto, Makoto ^{[8
]}

Barinov, Alexei ^{[9
]}

Jozwiak, Chris ^{[3
]}

Bostwick, Aaron ^{[3
]}

Rotenberg, Eli ^{[3
]}

Kou, Xufeng ^{[2
]}

Yang, Lexian ^{[11
]}

Guo, Yanfeng ^{[1
]}

Wang, Zhijun ^{[12
,13
]}

Yuan, Hongtao ^{[5
]}

Liu, Zhongkai ^{[1
,2
]}

Chen, Yulin ^{[1
,2
,6
,10
]}

机构：

[1] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[2] ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China

[3] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[4] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[5] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[6] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

[7] ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China

[8] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[9] Elettra Sincrotrone Trieste, I-34149 Trieste, Basovizza, Italy

[10] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[11] Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China

[12] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[13] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[14] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

MATTER | 2020年 / 3卷 / 06期

基金：

中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

MAJORANA FERMIONS; TRANSITION; STATES;

D O I：

10.1016/j.matt.2020.09.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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, Here, 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.

引用

页码：2055 / 2065

页数：11

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