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Title: Superconductivity in the Narrow Gap Semiconductor RbBi11/3Te6

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b08732· OSTI ID:1352590
 [1];  [1];  [1];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Department of Chemistry

Superconductivity was discovered in the layered compound RbBi11/3Te6, featuring Bi vacancies and a narrow band gap of 0.25(2) eV at room temperature. In addition, a sharp superconducting transition at similar to 3.2 K was observed in polycrystalline ingots. The superconducting volume fraction of oriented single crystals is almost 100%, confirming bulk superconductivity. Systematic Se and Sb substitutions in RbBi11/3-ySbySexTe6-x, revealed a dependence of the superconducting transition on composition that can increase the Tc up to similar to 10%. The RbBi11/3Te6 system is the first member of the new homologous series Rb[Bi2n+11/3Te3n+6] with infinite Bi2Te3-like layers. Lastly, the large degree of chemical tunability of the electronic structure of the homology via doping and/or substitution gives rise to a new family of superconductors.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1352590
Journal Information:
Journal of the American Chemical Society, Vol. 138, Issue 44; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Quaternary semiconductor Ba 8 Zn 4 Ga 2 S 15 featuring unique one-dimensional chains and exhibiting desirable yellow emission journal January 2019
Change in the electronic structure of the bismuth chalcogenide superconductor CsBi 4− x Pb x Te 6 by dissociation of the bismuth dimers journal January 2020
Quasi-two-dimensional superconductivity from dimerization of atomically ordered AuTe2Se4/3 cubes journal October 2017