Superconductivity as a Bose-Einstein condensation?

S.K. Adhikari , M. Casas , A. Puente , A. Rigo , M. Fortes , M.A. Sol\'is , M. de Llano , A.A. Valladares

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O. Rojo

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classification ❄️ cond-mat.supr-con cond-mat.soft

keywords bose-einsteincondensationdispersionsuperconductivityappropriatebelievedbosoniccenter-of-mass

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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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Superconductivity as a Bose-Einstein condensation?

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