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29 March 2024
 
  » arxiv » cond-mat/0012511

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Finite Temperature Time-Dependent Effective Theory for the Phase Field in two-dimensional d-wave Neutral Superconductor
Sergei G. Sharapov ; Hans Beck ; Vadim M. Loktev ;
Date 29 Dec 2000
Journal Phys.Rev. B64 (2001) 134519
Subject Superconductivity | cond-mat.supr-con hep-ph
AbstractWe derive finite temperature time-dependent effective actions for the phase of the pairing field, which are appropriate for a 2D electron system with both non-retarded d- and s-wave attraction. As for s-wave pairing the d-wave effective action contains terms with Landau damping, but their structure appears to be different from the s-wave case due to the fact that the Landau damping is determined by the quasiparticle group velocity v_{g}, which for d-wave pairing does not have the same direction as the non-interacting Fermi velocity v_{F}. We show that for d-wave pairing the Landau term has a linear low temperature dependence and in contrast to the s-wave case are important for all finite temperatures. A possible experimental observation of the phase excitations is discussed.
Source arXiv, cond-mat/0012511
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