Superconductivity as a Bose-Einstein condensation?

Details Superconductivity as a Bose-Einstein condensation? Superconductivity as a Bose-Einstein condensation?

2000-04-13

arxiv.org/abs/cond-mat/0004223v1

Published Physica C 341-348, 233 (2000)

Physics

Condensed Matter

Superconductivity

6 pages included 3 figures

Scientific paper

Bose-Einstein condensation (BEC) in two dimensions (2D) (e.g., to describe the quasi-2D cuprates) is suggested as the possible mechanism widely believed to underlie superconductivity in general. A crucial role is played by nonzero center-of-mass momentum Cooper pairs (CPs) usually neglected in BCS theory. Also vital is the unique {\it linear} dispersion relation appropriate to weakly-coupled "bosonic" CPs moving in the Fermi sea--rather than in vacuum where the dispersion would be quadratic but only for very strong coupling, and for which BEC is known to be impossible in 2D.

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