Condensed Matter Physics, 1996, No. 7, p. 53-59, English
DOI:10.5488/CMP.7.53
Title: CROSSOVER FROM BCS TO LOCAL PAIR SUPERCONDUCTIVITY IN QUASI-2D SYSTEMS
Authors: E.V.Gorbar, V.M.Loktev S.G.Sharapov (N.N.Bogolyubov Institute for Theoretical
Physics Ukrainian National Academy of Sciences, 14b Metrologichna St.,
252143 Kiev-143, Ukraine)
The finite temperature crossover from cooperative Cooper pairing
to independent bound state (composite bosons) formation and
condensation in quasi-2D systems is studied using the method of
effective potential. It is shown that at low density of carriers the
critical superconducting temperature is equal to that
of Bose-condensation for ideal quasi-2D Bose-gas with heavy
dynamical mass, meanwhile at high densities the BCS result remains
valid.
Comments: Refs. 16, Figs. 0, Tabs. 0.