Composition-induced structural instability and strong-coupling superconductivity in Au1−xPdxTe2
Kazutaka Kudo, Hiroyuki Ishii, Minoru Nohara
DOI 10.1103/PhysRevB.93.140505 · Physical Review B
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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 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Au1-xPdxTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.65 | Pressure not reported | unknown |
| Au1-xPdxTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.69 | Pressure not reported | unknown |
| AuTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure not reported | unknown |
| Au1-xPtxTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | unknown |
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