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Title: Proximity-induced superconductivity in a topological crystalline insulator

Abstract

Superconducting topological crystalline insulators (TCIs) are anticipated to host new topological phases protected by crystalline symmetries, but available materials are insufficiently suitable for surface studies. To induce superconductivity at the surface of a prototypical TCI SnTe, we use molecular beam epitaxy to grow a heterostructure of SnTe and a high-T c superconductor Fe(Te,Se), utilizing a “buffer” layer to bridge the large lattice mismatch between SnTe and Fe(Te,Se). Using low-temperature scanning tunneling microscopy and spectroscopy, we measure a prominent spectral gap on the surface of SnTe, and demonstrate its superconducting origin by its dependence on temperature and magnetic field. This report offers a platform for atomic-scale investigations of emergent topological phenomena in superconducting TCIs.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Boston College, Chestnut Hill, MA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Army Research Office (ARO)
OSTI Identifier:
1581238
Report Number(s):
BNL-212486-2019-JAAM
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Rachmilowitz, Bryan, Zhao, He, Li, Hong, LaFleur, Alexander, Schneeloch, J., Zhong, Ruidan, Gu, Genda, and Zeljkovic, Ilija. Proximity-induced superconductivity in a topological crystalline insulator. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.241402.
Rachmilowitz, Bryan, Zhao, He, Li, Hong, LaFleur, Alexander, Schneeloch, J., Zhong, Ruidan, Gu, Genda, & Zeljkovic, Ilija. Proximity-induced superconductivity in a topological crystalline insulator. United States. doi:10.1103/PhysRevB.100.241402.
Rachmilowitz, Bryan, Zhao, He, Li, Hong, LaFleur, Alexander, Schneeloch, J., Zhong, Ruidan, Gu, Genda, and Zeljkovic, Ilija. Wed . "Proximity-induced superconductivity in a topological crystalline insulator". United States. doi:10.1103/PhysRevB.100.241402.
@article{osti_1581238,
title = {Proximity-induced superconductivity in a topological crystalline insulator},
author = {Rachmilowitz, Bryan and Zhao, He and Li, Hong and LaFleur, Alexander and Schneeloch, J. and Zhong, Ruidan and Gu, Genda and Zeljkovic, Ilija},
abstractNote = {Superconducting topological crystalline insulators (TCIs) are anticipated to host new topological phases protected by crystalline symmetries, but available materials are insufficiently suitable for surface studies. To induce superconductivity at the surface of a prototypical TCI SnTe, we use molecular beam epitaxy to grow a heterostructure of SnTe and a high-Tc superconductor Fe(Te,Se), utilizing a “buffer” layer to bridge the large lattice mismatch between SnTe and Fe(Te,Se). Using low-temperature scanning tunneling microscopy and spectroscopy, we measure a prominent spectral gap on the surface of SnTe, and demonstrate its superconducting origin by its dependence on temperature and magnetic field. This report offers a platform for atomic-scale investigations of emergent topological phenomena in superconducting TCIs.},
doi = {10.1103/PhysRevB.100.241402},
journal = {Physical Review B},
number = 24,
volume = 100,
place = {United States},
year = {2019},
month = {12}
}

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