Large-radius translation invariant (TI) bipolarons are considered in a one-dimensional Holstein molecular chain. Criteria of their stability are obtained. The energy of a translation invariant bipolaron is shown to be lower than that of a bipolaron with broken symmetry. The results obtained are applied to the problem of superconductivity in 1D-systems. It is shown that TI-bipolaron mechanism of Bose-Einstein condensation can support superconductivity even for infinite chain.

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A translation invariant bipolaron in the Holstein model and superconductivity.

Correlation effects and configuration of a one-dimensional bipolaron

Large-radius translation invariant (TI) bipolarons are considered in a one-dimensional Holstein molecular chain. Criteria of their stability are obtained. The energy of a translation invariant bipolaron is shown to be lower than that of a bipolaron with broken symmetry. The results obtained are applied to the problem of superconductivity in 1D-systems. It is shown that TI-bipolaron mechanism of Bose-Einstein condensation can support superconductivity even for infinite chain.

A translation invariant bipolaron in the Holstein model and superconductivity

http://www.matbio.org/2015/Kashirina _10_283.pdf

N.I. Kashirina

Papers

Bipolaron in anisotropic crystals (arbitrary coupling)