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Title: Surface superconductivity in the type II Weyl semimetal TaIrTe4

Abstract

The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe4 is a newly predicted time-reversal invariant type II Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal TaIrTe4. Our scanning tunneling microscopy/spectroscopy (STM/STS) visualizes Fermi arc surface states of TaIrTe4that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature (Tc) up to 1.54 K being observed. The normalized upper critical field h*(T/Tc) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness- and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe4 provides a new novel platform to explore topological superconductivity and Majorana modes.

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [4];  [4];  [5];  [5];  [6]; ORCiD logo [7];  [7];  [8];  [9];  [10];  [9]
  1. China Univ. of Petroleum, Beijing (China); Peking Univ., Beijing (China). International Center for Quantum Materials
  2. School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, China
  3. Peking Univ., Beijing (China). International Center for Quantum Materials
  4. Huazhong Univ. of Science and Technology, Wuhan (China); Huazhong Univ. of Science and Technology, Wuhan (China). Wuhan National High Magnetic Field Center
  5. Zhejiang Univ., Hangzhou (China). State Key Lab. of Silicon Materials, Center of Electron Microscopy
  6. Univ. of Tennessee, Knoxville, TN (United States)
  7. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Weizmann Inst. of Science, Rehovot (Israel)
  9. Peking Univ., Beijing (China). International Center for Quantum Materials; Univ. of Chinese Academy of Sciences (CAS), Beijing (China). CAS Center for Excellence in Topological Quantum Computation; Beijing Academy of Quantum Information Sciences, (China); Collaborative Innovation Center of Quantum Matter (China)
  10. Shaanxi Normal Univ., Xi’an (China); Huazhong Univ. of Science and Technology, Wuhan (China)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation; National Science Foundation (NSF); National Key R&D Program of China; National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1651249
Grant/Contract Number:  
AC05-00OR22725; GBMF4416; DMR-1420451; 2462017YJRC012; 2462018BJC00; Z180010; 11888101; 11774008; 11574095; 11704414; 11574008; 11761161003; 11825401; 11921005; 11974430; 18YFA0305604; 2017YFA0303302; 2016YFA0301604
Resource Type:
Accepted Manuscript
Journal Name:
National Science Review
Additional Journal Information:
Journal Volume: 7; Journal Issue: 3; Journal ID: ISSN 2095-5138
Publisher:
China Science Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; surface superconductivity; Weyl semimetal; topological superconductivity

Citation Formats

Xing, Ying, Shao, Zhibin, Ge, Jun, Luo, Jiawei, Wang, Jinhua, Zhu, Zengwei, Liu, Jun, Wang, Yong, Zhao, Zhiying, Yan, Jiaqiang, Mandrus, David, Yan, Binghai, Liu, Xiong-Jun, Pan, Minghu, and Wang, Jian. Surface superconductivity in the type II Weyl semimetal TaIrTe4. United States: N. p., 2019. Web. https://doi.org/10.1093/nsr/nwz204.
Xing, Ying, Shao, Zhibin, Ge, Jun, Luo, Jiawei, Wang, Jinhua, Zhu, Zengwei, Liu, Jun, Wang, Yong, Zhao, Zhiying, Yan, Jiaqiang, Mandrus, David, Yan, Binghai, Liu, Xiong-Jun, Pan, Minghu, & Wang, Jian. Surface superconductivity in the type II Weyl semimetal TaIrTe4. United States. https://doi.org/10.1093/nsr/nwz204
Xing, Ying, Shao, Zhibin, Ge, Jun, Luo, Jiawei, Wang, Jinhua, Zhu, Zengwei, Liu, Jun, Wang, Yong, Zhao, Zhiying, Yan, Jiaqiang, Mandrus, David, Yan, Binghai, Liu, Xiong-Jun, Pan, Minghu, and Wang, Jian. Mon . "Surface superconductivity in the type II Weyl semimetal TaIrTe4". United States. https://doi.org/10.1093/nsr/nwz204. https://www.osti.gov/servlets/purl/1651249.
@article{osti_1651249,
title = {Surface superconductivity in the type II Weyl semimetal TaIrTe4},
author = {Xing, Ying and Shao, Zhibin and Ge, Jun and Luo, Jiawei and Wang, Jinhua and Zhu, Zengwei and Liu, Jun and Wang, Yong and Zhao, Zhiying and Yan, Jiaqiang and Mandrus, David and Yan, Binghai and Liu, Xiong-Jun and Pan, Minghu and Wang, Jian},
abstractNote = {The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe4 is a newly predicted time-reversal invariant type II Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal TaIrTe4. Our scanning tunneling microscopy/spectroscopy (STM/STS) visualizes Fermi arc surface states of TaIrTe4that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature (Tc) up to 1.54 K being observed. The normalized upper critical field h*(T/Tc) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness- and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe4 provides a new novel platform to explore topological superconductivity and Majorana modes.},
doi = {10.1093/nsr/nwz204},
journal = {National Science Review},
number = 3,
volume = 7,
place = {United States},
year = {2019},
month = {12}
}

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    Works referencing / citing this record:

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