Polaron Mass and Electron-Phonon Correlations in the Holstein Model
Author
Source
Advances in Condensed Matter Physics
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-10-15
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
The Holstein Molecular Crystal Model is investigated by a strong coupling perturbative method which, unlike the standard Lang-Firsov approach, accounts for retardation effects due to the spreading of the polaron size.
The effective mass is calculated to the second perturbative order in any lattice dimensionality for a broad range of (anti)adiabatic regimes and electron-phonon couplings.
The crossover from a large to a small polaron state is found in all dimensionalities for adiabatic and intermediate adiabatic regimes.
The phonon dispersion largely smoothes such crossover which is signalled by polaron mass enhancement and on-site localization of the correlation function.
The notion of self-trapping together with the conditions for the existence of light polarons, mainly in two- and three-dimensions, is discussed.
By the imaginary time path integral formalism I show how nonlocal electron-phonon correlations, due to dispersive phonons, renormalize downwards the e-ph coupling justifying the possibility for light and essentially small 2D Holstein polarons.
American Psychological Association (APA)
Zoli, Marco. 2009. Polaron Mass and Electron-Phonon Correlations in the Holstein Model. Advances in Condensed Matter Physics،Vol. 2010, no. 2010, pp.1-15.
https://search.emarefa.net/detail/BIM-500351
Modern Language Association (MLA)
Zoli, Marco. Polaron Mass and Electron-Phonon Correlations in the Holstein Model. Advances in Condensed Matter Physics No. 2010 (2010), pp.1-15.
https://search.emarefa.net/detail/BIM-500351
American Medical Association (AMA)
Zoli, Marco. Polaron Mass and Electron-Phonon Correlations in the Holstein Model. Advances in Condensed Matter Physics. 2009. Vol. 2010, no. 2010, pp.1-15.
https://search.emarefa.net/detail/BIM-500351
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-500351