Universität zu Köln

Bai, Mengmeng, Yang, Fan ORCID: 0000-0001-6841-1605, Luysberg, Martina, Feng, Junya, Bliesener, Andrea, Lippertz, Gertjan, Taskin, A. A., Mayer, Joachim ORCID: 0000-0003-3292-5342 and Ando, Yoichi (2020). Novel self-epitaxy for inducing superconductivity in the topological insulator (Bi1-xSbx)(2)Te-3. Phys. Rev. Mater., 4 (9). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2475-9953

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Abstract

Using the superconducting proximity effect for engineering a topological superconducting state in a topological insulator (TI) is a promising route to realize Majorana fermions. However, epitaxial growth of a superconductor on the TI surface to achieve a good proximity effect has been a challenge. We discovered that simply depositing Pd on thin films of the TI material (Bi1-xSbx)(2)Te-3 leads to an epitaxial self-formation of PdTe2 superconductor having the superconducting transition temperature of similar to 1 K. This self-formed superconductor proximitizes the TI, which is confirmed by the appearance of a supercurrent in Josephson-junction devices made on (Bi1-xSbx)(2)Te-3. This self-epitaxy phenomenon can be conveniently used for fabricating TI-based superconducting nanodevices to address the superconducting proximity effect in TIs.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bai, Mengmeng UNSPECIFIED UNSPECIFIED UNSPECIFIED Yang, Fan UNSPECIFIED orcid.org/0000-0001-6841-1605 UNSPECIFIED Luysberg, Martina UNSPECIFIED UNSPECIFIED UNSPECIFIED Feng, Junya UNSPECIFIED UNSPECIFIED UNSPECIFIED Bliesener, Andrea UNSPECIFIED UNSPECIFIED UNSPECIFIED Lippertz, Gertjan UNSPECIFIED UNSPECIFIED UNSPECIFIED Taskin, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mayer, Joachim UNSPECIFIED orcid.org/0000-0003-3292-5342 UNSPECIFIED Ando, Yoichi UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-319510
DOI:	10.1103/PhysRevMaterials.4.094801
Journal or Publication Title:	Phys. Rev. Mater.
Volume:	4
Number:	9
Date:	2020
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 ENERGY-GAP STRUCTURE Multiple languages Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/31951