Optical excitation of phase modes in strongly disordered superconductors (Articolo in rivista)

Type
Label
  • Optical excitation of phase modes in strongly disordered superconductors (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.89.174506 (literal)
Alternative label
  • T. Cea (1); D. Bucheli (1); G. Seibold (2); L. Benfatto (1); J. Lorenzana (1); C. Castellani (1) (2014)
    Optical excitation of phase modes in strongly disordered superconductors
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • T. Cea (1); D. Bucheli (1); G. Seibold (2); L. Benfatto (1); J. Lorenzana (1); C. Castellani (1) (literal)
Pagina fine
  • 174506 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Published 12 May 2014. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://journals.aps.org/prb/abstract/10.1103/PhysRevB.89.174506 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 89 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 9 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 17 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) ISC-CNR, Department of Physics, Sapienza University of Rome, Piazzale A. Moro 5, 00185 Rome, Italy (2) Institut für Physik, BTU Cottbus, P.O. Box 101344, 03013 Cottbus-Senftenberg, Germany (literal)
Titolo
  • Optical excitation of phase modes in strongly disordered superconductors (literal)
Abstract
  • According to the Goldstone theorem the breaking of a continuous U(1) symmetry comes along with the existence of low-energy collective modes. In the context of superconductivity these excitations are related to the phase of the superconducting (SC) order parameter and for clean systems are optically inactive; that is, single-mode excitations do not directly couple to light. Here we show that for strongly disordered superconductors phase modes acquire a dipole moment and appear as a subgap spectral feature in the optical conductivity. This finding is obtained with both a gauge-invariant random-phase approximation scheme based on a fermionic Bogoliubov-de Gennes state and a prototypical bosonic model for disordered superconductors. In the strongly disordered regime, where the system displays an effective granularity of the SC properties, the optically active dipoles are linked to the isolated SC islands, offering a new perspective for realizing microwave optical devices. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it