Universität zu Köln

Wang, Zhiwei ORCID: 0000-0003-0182-2471, Taskin, A. A., Frolich, Tobias, Braden, Markus ORCID: 0000-0002-9284-6585 and Ando, Yoichi ORCID: 0000-0002-3553-3355 (2016). Superconductivity in Ti0.6Bi2Te3 Derived from a Topological Insulator. Chem. Mat., 28 (3). S. 779 - 785. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-5002

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Abstract

Bulk superconductivity has been discovered in Tl0.6Bi2Te3, which is derived from the topological insulator Bi2Te3. A superconducting volume fraction of up to 95% (determined from the specific heat) with a T-c of 2.28 K was observed. The carriers are p-type with a density of similar to 1.8 X 10(20) cm(-3). Resistive transitions under magnetic fields point to an unconventional temperature dependence of the upper critical field B-c2. The crystal structure appears to be unchanged from that of Bi2Te3, with a shorter c lattice parameter, which, together with the Rietveld analysis, suggests that Tl ions are incorporated but not intercalated. This material is an interesting candidate for a topological superconductor that may be realized by the strong spin-orbit coupling inherent to topological insulators.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wang, Zhiwei UNSPECIFIED orcid.org/0000-0003-0182-2471 UNSPECIFIED Taskin, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Frolich, Tobias UNSPECIFIED UNSPECIFIED UNSPECIFIED Braden, Markus UNSPECIFIED orcid.org/0000-0002-9284-6585 UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-284684
DOI:	10.1021/acs.chemmater.5b03727
Journal or Publication Title:	Chem. Mat.
Volume:	28
Number:	3
Page Range:	S. 779 - 785
Date:	2016
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1520-5002
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 SPIN Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28468