Superconductivity in the Narrow Gap Semiconductor RbBi11/3Te6

Christos D. Malliakas, Duck Young Chung, Helmut Claus, Mercouri G Kanatzidis

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16 Citations (Scopus)

Abstract

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. A sharp superconducting transition at ∼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 ∼10%. The RbBi11/3Te6 system is the first member of the new homologous series Rb[Bi2n+11/3Te3n+6] with infinite Bi2Te3-like layers. 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.

Original languageEnglish
Pages (from-to)14694-14698
Number of pages5
JournalJournal of the American Chemical Society
Volume138
Issue number44
DOIs
Publication statusPublished - Nov 9 2016

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ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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