Electronic-structure effects in the suppression of superconductivity in hydrogenated Zr2Rh
H. G. Salunke, G. P. Das, P. Raj, K. Shashikala, A. Sathyamoorthy, S. K. Dhar
DOI 10.1103/PhysRevB.53.12299 · Physical Review B
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Abstract
The observed suppression of superconductivity on hydrogenation of the C16-structured intermetallic compound Zr2Rh is explained qualitatively on the basis of the relationship between the electronic density of states at the Fermi level, the electron-phonon coupling constant, and Tc. The density of states at the Fermi level obtained from our local density electronic structure calculations has been compared with that estimated from low-temperature specific heat data. In pure Zr2Rh, a relatively large superconducting transition temperature (Tc∼11 K) arises due to the Fermi level lying at the peak of the density of states, while in case of hydrogenated Zr2Rh the lowering of Tc can be ascribed to the filling of bands and the shifting of the Fermi level either to a valley of the density of states (as in case of Zr2RhH2) or to a broad hump in the density of states (as in case of Zr2RhH4). © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Zr2Rh Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.2 | Pressure not reported | unknown |
| Zr2RhH2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | unknown |
| Zr2RhH4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | unknown |
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