Mass enhancement in narrow band systems
arXiv:cond-mat/0004323 · doi:10.1088/0953-8984/12/12/316
Abstract
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.
Istituto Nazionale di Fisica della Materia - Dipartimento di Matematica e Fisica, Istituto Nazionale di Fisica della Materia Universita' di Camerino, 62032 Camerino, Italy
References in corpus (5)
- Mobile small polaron
- Polaron Effective Mass, Band Distortion, and Self-Trapping in the Holstein Molecular Crystal Model
- Mobile Bipolarons in the Adiabatic Holstein-Hubbard Model in 1 and 2 dimensions
- Comment on `Dynamical properties of small polarons'
- Dynamical properties of the two-dimensional Holstein-Hubbard model in the normal state at zero temperature: A fluctuation-based effective cumulant approach