Optimization of the superconducting transition temperature of the filled skutterudite BaPt4Ge12 by gold substitution
R. Gumeniuk, H. Rosner, W. Schnelle, M. Nicklas, A. Leithe-Jasper, Yu. Grin
DOI 10.1103/PhysRevB.78.052504 · Physical Review B
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Abstract
The dependence of the superconducting properties of BaPt4Ge12 upon substitution of platinum by gold is investigated. Full-potential electronic structure calculations suggest that the electronic density of states and the critical temperature of superconductivity Tc increases with gold content. This is confirmed by experiments. Single phase samples of BaPt4−xAuxGe12 with x≤1 are synthesized. The structural properties, magnetization, specific heat, and electrical resistivity in magnetic fields are probed. As predicted, Tc increases significantly from 5.0 K (x=0) to 7.0 K (x=1).
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
| BaPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | midpoint |
| BaPt4-xAuxGe12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | unknown |
| BaPt4-xAuxGe12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | midpoint |
| PrPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.9 | Pressure not reported | unknown |
| LaPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.3 | Pressure not reported | unknown |
| ThPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.62 | Pressure not reported | unknown |
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