The role of the impurity-potential range in disordered d-wave superconductors (Articolo in rivista)

Type
Label
  • The role of the impurity-potential range in disordered d-wave superconductors (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Dell'Anna, L; Fabrizio, M; Castellani, C (2007)
    The role of the impurity-potential range in disordered d-wave superconductors
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Dell'Anna, L; Fabrizio, M; Castellani, C (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Dusseldorf, Inst Theoret Phys, D-40225 Dusseldorf, Germany; Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy; Abdus Salam Int Ctr Theoret Phys ICTP, I-34014 Trieste, Italy; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; INFM SMC, I-00185 Rome, Italy (literal)
Titolo
  • The role of the impurity-potential range in disordered d-wave superconductors (literal)
Abstract
  • We analyse how the range of disorder affects the localization properties of quasiparticles in a two-dimensional d-wave superconductor within the standard non-linear sigma-model approach to disordered systems. We show that for purely long range disorder, which only induces intra-node scattering processes, the approach is free from the ambiguities which often beset the disordered Dirac-fermion theories, and gives rise to a Wess-Zumino-Novikov-Witten action leading to vanishing density of states and finite conductivities. We also study the crossover induced by inter-node scattering due to a short range component of the disorder, thus providing a coherent non-linear sigma-model description in agreement with all the various findings of different approaches. (literal)
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