Universität zu Köln

Bliesener, Andrea, Feng, Junya, Taskin, A. A. and Ando, Yoichi ORCID: 0000-0002-3553-3355 (2019). Superconductivity in Sn1-xInx Te thin films grown by molecular beam epitaxy. Phys. Rev. Mater., 3 (10). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2475-9953

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Abstract

The superconductor Sn1-xInx Te is derived from the topological crystalline insulator SnTe and is a candidate topological superconductor. So far, high-quality thin films of this material have not been available, even though such samples would be useful for addressing the nature of its superconductivity. Here we report the successful molecular beam epitaxy growth of superconducting Sn1-xInx Te films by using Bi2Te3 as a buffer layer. The data obtained from tunnel junctions made on such films show the appearance of two superconducting gaps, which points to the coexistence of bulk and surface superconductivity. Given the spin-momentum locking of the surface states, the surface superconductivity is expected to be topological with an effective p-wave character. Since the topological surface states of SnTe consist of four Dirac cones, this platform offers an interesting playground for studying topological surface superconductivity with additional degrees of freedom.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bliesener, Andrea UNSPECIFIED UNSPECIFIED UNSPECIFIED Feng, Junya UNSPECIFIED UNSPECIFIED UNSPECIFIED Taskin, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-130730
DOI:	10.1103/PhysRevMaterials.3.101201
Journal or Publication Title:	Phys. Rev. Mater.
Volume:	3
Number:	10
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2475-9953
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13073