Isotope effects and pressure dependence of the Tc of superconducting stoichiometric PdH and PdD synthesized and measured in a diamond anvil cell

H. Hemmes; A. Driessen; R. Griessen; M. Gupta

doi:10.1103/PhysRevB.39.4110

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Isotope effects and pressure dependence of the Tc of superconducting stoichiometric PdH and PdD synthesized and measured in a diamond anvil cell

H. Hemmes, A. Driessen, R. Griessen, M. Gupta

DOI 10.1103/PhysRevB.39.4110 · Physical Review B

T1

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Abstract

We have synthesized stoichiometric PdH and PdD in a diamond anvil cell and measured in situ the pressure dependence of the superconducting transition temperature. From an analysis of the results and band-structure calculations, we find that both the anharmonicity of the Pd-H potential and the effect of the large zero-point motion of the hydrogen isotopes are needed to explain the inverse isotope effect and the observed pressure dependence of Tc.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
PdH Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
PdD Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown