Nuclear relaxation rate in layered superconductors with unconventional pairing
S. V. Maleyev, A. G. Yashenkin, D. N. Aristov
DOI 10.1103/PhysRevB.50.13825 · Physical Review B
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Abstract
The cubic temperature dependence of the nuclear relaxation rate (NRR) in layered superconductors with the order parameter having zeros at the Fermi surface (FS) is found to be universal under quite general conditions. The coefficient in the quasi-Korringa term for the NRR appearing at low temperatures due to impurity scattering is estimated. It is shown that an anisotropy of the gap function over the FS leads to the disappearance of the Hebel-Slichter coherence peak close to Tc. The corresponding analysis of the widely accepted model [D. Thelen et al., Phys. Rev. B 47, 9151 (1993)] for the Y-Ba-Cu-O system is presented.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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