Pre-formed Cooper pairs and Bose-Einstein condensation in cuprate superconductors
M. Casas, M. de Llano, A. Puente, A. Rigo, M. A. Solís
Abstract
A two-dimensional (2D) assembly of noninteracting, temperature-dependent, pre-formed Cooper pairs in chemical/thermal equilibrium with unpaired fermions is examined in a binary boson-fermion statistical model as the Bose-Einstein condensation (BEC) singularity temperature Tc is approached from above. Compared with BCS theory (which is not a BEC theory) substantially higher Tc's are obtained without any adjustable parameters, that fall roughly within the range of empirical Tc's for quasi-2D cuprate superconductors.
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