A translation invariant bipolaron in the Holstein model and superconductivity
نویسنده
چکیده
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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عنوان ژورنال:
دوره 5 شماره
صفحات -
تاریخ انتشار 2016