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Title: Unexpected superconductivity at nanoscale junctions made on the topological crystalline insulator Pb0.6Sn0.4Te
Authors: Das, Shekhar
Aggarwal, Leena
Roychowdhury, Subhajit
Aslam, Mohammad
Gayen, Sirshendu
Biswas, Kanishka
Sheet, Goutam
Keywords: Physics
Issue Date: 2016
Publisher: American Institute Physics
Citation: Das, S.; Aggarwal, L.; Roychowdhury, S.; Aslam, M.; Gayen, S.; Biswas, K.; Sheet, G., Unexpected superconductivity at nanoscale junctions made on the topological crystalline insulator Pb0.6Sn0.4Te. Applied Physics Letters 2016, 109 (13), 5
Applied Physics Letters
Abstract: Discovery of exotic phases of matter from the topologically non-trivial systems not only makes the research on topological materials more interesting but also enriches our understanding of the fascinating physics of such materials. Pb0.6Sn0.4Te was recently shown to be a topological crystalline insulator. Here, we show that by forming a mesoscopic point-contact using a normal non-superconducting elemental metal on the surface of Pb0.6Sn0.4Te, a superconducting phase is created locally in a confined region under the point-contact. This happens when the bulk of the sample remains to be non-superconducting, and the superconducting phase emerges as a nano-droplet under the point-contact. The superconducting phase shows a high transition temperature T-c that varies for different point-contacts and falls in a range between 3.7K and 6.5 K. Therefore, this Letter presents the discovery of a superconducting phase on the surface of a topological crystalline insulator, and the discovery is expected to shed light on the mechanism of induced superconductivity in topologically non-trivial systems in general. Published by AIP Publishing.
Description: Restricted Access
ISSN: 0003-6951
Appears in Collections:Research Papers (Kaniska Biswas)

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