Many-polaron states in the Holstein-Hubbard model

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A variational approach is proposed to determine some properties of the adiabatic Holstein-Hubbard model which describes the interactions between a static atomic lattice and an assembly of fermionic charge carriers. The sum of the electronic energy and the lattice elastic energy is proved to have minima with a polaron structure in a certain domain of the phase diagram. Our analytical work consists in the expansion of these energy minima from the zero electronic transfer limit which remarkably holds for a finite amplitude of the onsite Hubbard repulsion and for an unbounded lattice size.
submitted to Journal of Statistical Physics

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Strongly Correlated Electrons, Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/18271

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0109342
 http://arxiv.org/abs/cond-mat/0109342

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arXiv