Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-07-16
Eur. Phys. J. B 75, 475-480 (2010)
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 3 figures
Scientific paper
The electronic properties of the quarter-filled extended Peierls-Holstein-Hubbard model that includes lattice distortions and molecular deformations are investigated theoretically using the bosonization approach. We predict the existence of a wide variety of charge-elastic phases depending of the values of the Peierls and Holstein couplings. We include the effect of the Peierls deformation in the nearest-neighbor repulsion V, that may be present in real materials where Coulomb interactions depend strongly on the distance, and we show that the phase diagram changes substantially for large V when this term is taken into account.
Cabra Daniel C.
Rosales H. D.
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