Superconductivity and electronic instability at high pressure in Sc5Co4Si10-type compounds
H. D. Yang, R. N. Shelton, H. F. Braun
DOI 10.1103/PhysRevB.33.5062 · Physical Review B
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Abstract
The variation of the superconducting transition temperature (Tc) with hydrostatic pressure up to 23.7 kbar is reported for eleven ternary silicides and germanides with the Sc5Co4Si10-type structure. Most of these compounds display a modest linear depression of Tc with pressure (dTc/dp∼10−5 K/bar); however, two materials, Lu5Ir4Si10 and Lu5Rh4Si10, undergo a discontinuous transformation to a state with a significantly higher Tc above a critical pressure of about 20 kbar. For Lu5Ir4Si10, the pressure-enhanced Tc of 9.12 K is the highest transition temperature reported for this class of compounds.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Lu5Ir4Si10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.12 | 2 GPa | unknown |
| Lu5Ir4Si10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | Pressure unresolved | unknown |
| Lu5Rh4Si10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure unresolved | unknown |
| Sc5Rh4Si10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.5 | Pressure unresolved | unknown |
| Sc5Ir4Si10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.4 | Pressure unresolved | unknown |
| Sc5Co4Si10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.8 | Pressure unresolved | unknown |
| Y5Ir4Si10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure unresolved | unknown |
| Y5Os4Ge10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure unresolved | unknown |
| Y5Ir4Ge10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure unresolved | unknown |
| Y5Rh4Ge10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.9 | Pressure unresolved | unknown |
| Lu5Ir4Ge10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.3 | Pressure unresolved | unknown |
| Lu5Rh4Ge10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure unresolved | unknown |
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