Comment on `Experimental and Theoretical Constraints of Bipolaronic Superconductivity in High $T_{c}$ Materials: An Impossibility'

Details Comment on `Experimental and Theoretical Constraints of Bipolaronic Superconductivity in High $T_{c}$ Materials: An Impossibility' Comment on `Experimental and Theoretical Constraints of Bipolaronic Superconductivity in High $T_{c}$ Materials: An Impossibility'

1998-07-13

arxiv.org/abs/cond-mat/9807185v1

Physics

Condensed Matter

Superconductivity

1 page, no figures

Scientific paper

10.1103/PhysRevLett.82.2620

We show that objections raised by Chakraverty $et$ $al$ (Phys. Rev. Lett. 81, 433 (1998)) to the bipolaron model of superconducting cuprates are the result of an incorrect approximation for the bipolaron energy spectrum and misuse of the bipolaron theory. The consideration, which takes into account the multiband energy structure of bipolarons and the unscreened electron-phonon interaction clearly indicates that cuprates are in the Bose-Einstein condensation regime with mobile charged bosons.

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