Mass enhancement in narrow band systems

Details Mass enhancement in narrow band systems Mass enhancement in narrow band systems

2000-04-19

arxiv.org/abs/cond-mat/0004323v2

Journal of Physics: Condensed Matter Vol.12, p.2783 (2000)

Physics

Condensed Matter

Superconductivity

Istituto Nazionale di Fisica della Materia - Dipartimento di Matematica e Fisica, Istituto Nazionale di Fisica della Materia U

Scientific paper

10.1088/0953-8984/12/12/316

A perturbative study of the Holstein Molecular Crystal Model which accounts for lattice structure and dimensionality effects is presented. Antiadiabatic conditions peculiar of narrow band materials and an intermediate to strong electron-phonon coupling are assumed. The polaron effective mass depends crucially in all dimensions on the intermolecular coupling strengths which also affect the size of the lattice deformation associated with the small polaron formation.

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