Superconductivity in Tl0.6Bi2Te3 Derived from a Topological Insulator

Zhiwei Wang, A. A. Taskin, Tobias Frölich, Markus Braden, Yoichi Ando*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)

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 Tc of 2.28 K was observed. The carriers are p-type with a density of ∼1.8 × 1020 cm-3. Resistive transitions under magnetic fields point to an unconventional temperature dependence of the upper critical field Bc2. 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.

Original languageEnglish
Pages (from-to)779-784
Number of pages6
JournalChemistry of Materials
Volume28
Issue number3
DOIs
Publication statusPublished - 9 Feb 2016
Externally publishedYes

Fingerprint

Dive into the research topics of 'Superconductivity in Tl0.6Bi2Te3 Derived from a Topological Insulator'. Together they form a unique fingerprint.

Cite this