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arXiv · 1201.1400

Mobile small bipolarons on a three-dimensional cubic lattice

A. R. Davenport·J. P. Hague·P. E. Kornilovitch
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Abstract

We use numerically exact quantum Monte Carlo (QMC) to compute the properties of three-dimensional bipolarons for interaction strengths where perturbation theory fails. For intermediate electron-phonon coupling and Hubbard U, we find that bipolarons can be both small and light, a prerequisite for bipolaron superconductivity. We use the QMC results to make estimates of transition temperatures, which peak at between 90-120 K and are demonstrated to be insensitive to Coulomb repulsion and impurities.

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A. R. Davenport, J. P. Hague, P. E. Kornilovitch. 2012-01-06. Mobile small bipolarons on a three-dimensional cubic lattice. https://doi.org/10.1103/physrevb.86.035106

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