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[en] We examine the crossover scenario from a condensate of overlapping Cooper pairs (BCS superconductor) to a Bose phase consisting of tightly bound local pairs via solving Bogoliubov-de Gennes equation numerically on a two dimensional attractive Hubbard model. To support the claim for the crossover phenomena, the chemical potential μ, is calculated as a function of interparticle attraction strength U at T = 0 and finite temperatures. It may be noted that μ slipping below the band minimum bears the signature of a crossover. Further, the variation of μ as a function of U for different values of electronic densities n, provides useful insight into the density dependence of crossover. (author)
Source
Sunder, Meenakshi (ed.) (High Pressure Physics Div., Bhabha Atomic Research Centre, Mumbai (India)); Rajarajan, A.K. (ed.) (Solid State Physics Div., Bhabha Atomic Research Centre, Mumbai (India)); Kothiyal, G.P. (ed.) (Technical Physics and Prototype Engineering Div., Bhabha Atomic Research Centre, Mumbai (India)); Board of Research in Nuclear Sciences, Dept. of Atomic Energy, Mumbai (India); 1348 p; ISBN 978-81-8372-044-1; 
; 2008; p. 911-912; 53. DAE solid state physics symposium; Mumbai (India); 16-20 Dec 2008; 7 refs., 2 figs.
; 2008; p. 911-912; 53. DAE solid state physics symposium; Mumbai (India); 16-20 Dec 2008; 7 refs., 2 figs.