Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1810193 | Physica B: Condensed Matter | 2013 | 4 Pages |
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
Authors
S. Nath, N.S. Mondal, N.K. Ghosh,