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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/2748

Title: Superlight small bipolarons in the presence of strong Coulomb repulsion
Authors: Hague, J.P.
Kornilovitch, P.E.
Samson, J.H.
Alexandrov, A.S.
Keywords: Superconductivity
Strongly correlated electrons
Issue Date: 2007
Abstract: We study a lattice bipolaron on a staggered triangular ladder and triangular and hexagonal lattices with both long-range electron-phonon interaction and strong Coulomb repulsion using a novel continuous-time quantum Monte-Carlo (CTQMC) algorithm extended to the Coulomb-Frohlich model with two particles. The algorithm is preceded by an exact integration over phonon degrees of freedom, and as such is extremely efficient. The bipolaron effective mass and bipolaron radius are computed. Lattice bipolarons on such lattices have a novel crablike motion, and are small but very light in a wide range of parameters, which leads to a high Bose-Einstein condensation temperature. We discuss the relevance of our results with current experiments on cuprate high-temperature superconductors and propose a route to room temperature superconductivity.
Description: This is a pre-print of an article to be published in the journal, Physics Review Letters. It is also available at: http://uk.arxiv.org/abs/cond-mat/0606036
URI: https://dspace.lboro.ac.uk/2134/2748
Appears in Collections:Pre-Prints (Physics)

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