INVESTIGADORES
KOVAL Sergio Fabian
congresos y reuniones científicas
Título:
Exact diagonalization study of the two-dimensional t-J-Holstein model
Autor/es:
A. DOBRY; A. GRECO; S. KOVAL; J. RIERA
Lugar:
Gramado
Reunión:
Simposio; XIII Simposio Latinoamericano de Física del Estado Sólido, SLAFES; 1995
Resumen:
Abstract:We study by exact diagonalization the two-dimensional t-J-Holstein
model near quarter filling by retaining only a few phonon modes in
momentum space. This truncation allows us to incorporate the full
dynamics of the retained phonon modes. The behavior of the kinetic
energy, the charge structure factor, and other physical quantities show
the presence of a transition from a delocalized phase to a localized
phase at a finite value of the electron-phonon (e-ph) coupling. We have also given some indications that the e-ph coupling leads in general to a suppression of the pairing susceptibility at quarter filling.