Contribution to the quasiparticle inelastic lifetime from paramagnons in disordered superconductors

T. P. Devereaux

doi:10.1103/PhysRevB.62.682

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Contribution to the quasiparticle inelastic lifetime from paramagnons in disordered superconductors

T. P. Devereaux

DOI 10.1103/PhysRevB.62.682 · Physical Review B

T1

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Abstract

The paramagnon contribution to the quasiparticle inelastic-scattering rate in disordered superconductors is presented. Using Anderson’s exact eigenstate formalism, it is shown that the scattering rate is Stoner enhanced and is further enhanced by the disorder relative to the clean case in a manner similar to the disorder enhancement of the long-range Coulomb contribution. The results are discussed in connection with the possibility of conventional or unconventional superconductivity in the borocarbides. The results are compared to recent tunneling experiments on LuNi2B2C.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LuNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Y(Ni2-xCox)B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown