Composition-induced structural instability and strong-coupling superconductivity in Au1-xPdxTe2

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Abstract

The physical properties and structural evolution of the MX2-type solid solution Au1-xPdxTe2 are reported. The end member AuTe2 is a normal metal with a monoclinic distorted CdI2-type structure with preformed Te-Te dimers. A monoclinic-trigonal structural phase transition at a finite temperature occurs upon Pd substitution and is suppressed to zero temperature near x = 0.55, and a superconducting phase with a maximum T-c = 4.65 K emerges. A clear indication of strong-coupling superconductivity is observed near the composition of the structural instability. The competitive relationship between Te-Te dimers and superconductivity is proposed.

Journal

  • Physical Review B

    Physical Review B 93(14), 140505, 2016-04

    American Physical Society

Codes

  • NII Article ID (NAID)
    120006380500
  • NII NACSIS-CAT ID (NCID)
    AA11187113
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    2469-9950
  • Data Source
    IR 
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