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

Kazutaka Kudo; Hiroyuki Ishii; Minoru Nohara

doi:10.1103/PhysRevB.93.140505

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

Kazutaka Kudo, Hiroyuki Ishii, Minoru Nohara

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32 Citations (Scopus)

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 Tc=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.

Original language	English
Article number	140505
Journal	Physical Review B
Volume	93
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.93.140505
Publication status	Published - Apr 25 2016

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Composition-induced structural instability and strong-coupling superconductivity in Au1-xPdxTe2",

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 Tc=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.",

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N2 - 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 Tc=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.

AB - 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 Tc=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.

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

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