We study the quasiparticle transport coefficients in disordered d-wave superconductors. We find that spin and charge excitations are generally localized unless magnetic impurities are present. If the system is close to a nesting point in the impurity-scattering unitary limit, the tendency towards localization is reduced while the quasiparticle density of states gets enhanced by disorder. We also show that the residual repulsive interaction among quasiparticles has a delocalizing effect and increases the density of states.
Quasiparticle conductivities in disordered d-wave superconductors / Michele, Fabrizio; Luca, Dell'Anna; Castellani, Claudio. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 88:7(2002), pp. 076603-1-076603-4. [10.1103/physrevlett.88.076603]
Quasiparticle conductivities in disordered d-wave superconductors
CASTELLANI, Claudio
2002
Abstract
We study the quasiparticle transport coefficients in disordered d-wave superconductors. We find that spin and charge excitations are generally localized unless magnetic impurities are present. If the system is close to a nesting point in the impurity-scattering unitary limit, the tendency towards localization is reduced while the quasiparticle density of states gets enhanced by disorder. We also show that the residual repulsive interaction among quasiparticles has a delocalizing effect and increases the density of states.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.