Crossover from BCS to Bose superconductivity: Transition temperature and time-dependent Ginzburg-Landau theory
C. A. R. Sá de Melo, Mohit Randeria, Jan R. Engelbrecht
DOI 10.1103/PhysRevLett.71.3202 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We use a functional integral formulation to study the finite temperature crossover from cooperative Cooper pairing to independent bound state formation and condensation. We show the inadequacy of mean field results for normal state properties obtained at the saddle point level as the coupling increases. The importance of quantum (temporal) fluctuations is pointed out and an interpolation scheme for Tc is derived from this point of view. The time-dependent Ginzburg-Landau (TDGL) equation near Tc is shown to describe a damped mode in the BCS limit, and a propagating one in the Bose limit. A singular point is identified at intermediate coupling where a simple TDGL description fails.
Similar papers
Thermodynamics of Crossover from Weak- to Strong-Coupling Superconductivity
similarity 0.89Egor Babaev · 2000 · arXiv:cond-mat/0010085
Source status unknown — claims are unverified
BCS-BEC crossover at finite temperature for superfluid trapped Fermi atoms
similarity 0.89A. Perali et al. · 2003 · arXiv:cond-mat/0311309
Source status unknown — claims are unverified
Evolution from BCS superconductivity to Bose-Einstein condensation: Current correlation function in the broken-symmetry phase
similarity 0.89N. Andrenacci et al. · 2003 · arXiv:cond-mat/0305324
Source status unknown — claims are unverified
BCS Superconductivity in Quantum Critical Metals
similarity 0.88Jian-Huang She & Jan Zaanen · 2009 · arXiv:0905.1225
Source status unknown — claims are unverified
Nonequilibrium Cooper pairing in the nonadiabatic regime
similarity 0.88Emil A. Yuzbashyan et al. · 2005 · arXiv:cond-mat/0505493
Source status unknown — claims are unverified
Energy gap and critical temperature in a resonating-valence-bond theory of high-Tc superconductivity
similarity 0.88Michael Nauenberg
Source status unknown — claims are unverified