Article ID Journal Published Year Pages File Type
1810193 Physica B: Condensed Matter 2013 4 Pages PDF
Abstract

An exact diagonalization study of Hubbard model having on-site electron–phonon interaction and inter-site phonon mediated interaction shows that on-site electron–phonon interaction generates an effective attraction between electrons which eventually forms on-site bipolaron. On the other hand, phonon mediated interaction between electrons at nearest-neighbor sites is suppressed by on-site Coulomb repulsion initially, but at certain larger strength this interaction strengthen the on-site electron–phonon interaction. There is also formation of neighboring-site bipolaron. Results show that interplay between electron–electron interaction and electron–phonon interaction is very much relevant.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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