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Title: Superconductivity in the 2-Dimensional Homologous Series AM mBi 3Q 5+m ( m =1, 2) (A=Rb, Cs; M=Pb, Sn; Q=Se, Te)

Here, superconductivity in the two-dimensional AM mBi 3Q 5+m family of semimetals is reported. The AMBi 3Te 6 ( m=1) and AM 2Bi 3Te 7 ( m=2) members of the homologous series with A=Rb, Cs and M=Pb, Sn undergo a bulk superconducting transition ranging from 2.7 to 1.4 K depending on the composition. The estimated superconducting volume fraction is about 90 %. Superconducting phase diagrams as a function of chemical pressure are constructed for the solid solution products of each member of the homologous series, AMBi 3-xSb xTe 6-ySe y and AM 2Bi 3-xSb xTe 7-ySe y (0≤x≤3 or 0≤y≤2). The structural flexibility of the ternary AM mM' 3Te 5+m semiconducting homology to form isostructural analogues with a variety of metals, M=Pb, Sn; M'=Bi, Sb, gives access to a large number of electronic configurations and superconductivity due to chemical pressure effects.
 [1] ; ORCiD logo [2] ;  [2] ;  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Chemistry - A European Journal
Additional Journal Information:
Journal Volume: 24; Journal Issue: 28; Journal ID: ISSN 0947-6539
ChemPubSoc Europe
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; bismuth-based superconductors; homologous series; superconductivity; two-dimensional layered compounds
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1434538