T-F-SCALED SUPERCONDUCTIVITY IN A FERMION-QUASI-BOSON MIXTURE WITH BOSE-EINSTEIN CONDENSATION

Nonzero center-of-mass momentum Cooper pairs lead to robustly higher s uperconducting T-c values in three as well as in two dimensions, compa red with BCS T-c values. This occurs even in the limit of weakly-coupl ed, electron-phonon-interacting fermions which bind together into Coop er pairs constituting the quasibosons in an ideal (interactionless) fe rmion-quasiboson 3D or 2D mixture that undergoes Bose-Einstein condens ation. The result in 3D is T-c --> 0.989T(F), where T-F is the Fermi t emperature, and compares with the 2D result T-c --> T-F/ln 2 similar o r equal to 1.443T(F), both of which follow from the linear dispersion law of a Cooper pair in the longwavelength limit, i.e., small center-o f-mass pair momenta.