Two-site polaron problem: A perturbation approach with variational basis states

Authors
Das, AN Chatterjee, J
Citation
An. Das et J. Chatterjee, Two-site polaron problem: A perturbation approach with variational basis states, MOD PHY L B, 13(32), 1999, pp. 3903-3914
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
MODERN PHYSICS LETTERS B
ISSN journal
02179849 → ACNP
Volume
13
Issue
32
Year of publication
1999
Pages
3903 - 3914
Database
ISI
SICI code
0217-9849(199912)13:32<3903:TPPAPA>2.0.ZU;2-S
Abstract
A convergent perturbation method using modified Lang Firsov transformation is developed for a two-site single-polaron system. The method is applicable for the entire range of the electron-phonon coupling strength from the ant iadiabatic limit to the intermediate region of hopping. The single-electron energies, oscillator wavefunctions and correlation functions, calculated u sing this method, are in good agreement with the exact results.