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

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

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
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Abstract

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.
Original languageEnglish
Pages (from-to)172-175
JournalPhysica Status Solidi C: Conferences
Volume1
Issue number1
DOIs
Publication statusPublished - 2004

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