Nonlocal electron-phonon coupling: influence on the nature of polarons

V.M. Stojanovic, P.A. Bobbert, M.A.J. Michels

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6 Citaten (Scopus)
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Samenvatting

We present a variational approach to an extended Holstein model, comprising both local and nonlocal electron-phonon coupling. The approach is based on the minimization of a Bogoliubov bound to the free energy of the coupled electron-phonon system, and is implemented for a one-dimensional nearest-neighbor model, with Einstein phonons. The ambivalent character of nonlocal coupling, which both promotes and hinders transport, is clearly observed. A salient feature of our results is that the local and nonlocal couplings can compensate each other, leading to a supression of polaronic effects.
Originele taal-2Engels
Pagina's (van-tot)172-175
TijdschriftPhysica Status Solidi C: Conferences
Volume1
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 2004

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