American Physical Society Acta Medica Okayama 2469-9950 93 14 2016 Composition-induced structural instability and strong-coupling superconductivity in Au1-xPdxTe2 140505 EN Kazutaka Kudo Department of Physics, Okayama University Hiroyuki Ishii Department of Physics, Okayama University Minoru Nohara Research Institute for Interdisciplinary Science, Okayama University 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. No potential conflict of interest relevant to this article was reported.