Superconductivity in the ternary rare-earth (Y, La, and Lu) compounds RPd2Si2 and RRh2Si2
T. T. M. Palstra, G. Lu, A. A. Menovsky, G. J. Nieuwenhuys, P. H. Kes, J. A. Mydosh
DOI 10.1103/PhysRevB.34.4566 · Physical Review B
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Abstract
We have investigated the superconducting and metallurgical properties of the ternary compounds RPd2Si2 and RRh2Si2 with R=Y, La, and Lu. All RPd2Si2 compounds and LaRh2Si2 were found to be type-I superconductors below 1 K. A detailed metallurgical analysis shows that segregation of second phases can easily mask the intrinsic (stoichiometric ratio 1:2:2) intermetallic-compound properties. Two sample-preparation techniques, viz., single crystals and off-stoichiometry, were utilized to establish where bulk superconductivity occurs. The type-I behavior of these compounds is explained with an analogous model as is used for the heavy-fermion superconductors CeCu2Si2 and URu2Si2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YPd2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.47 | Pressure unresolved | unknown |
| LaPd2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.39 | Pressure unresolved | unknown |
| LuPd2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.67 | Pressure unresolved | unknown |
| LaRh2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.074 | Pressure unresolved | unknown |
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