Mott-Peierls Transition in the extended Peierls-Hubbard model

Details Mott-Peierls Transition in the extended Peierls-Hubbard model Mott-Peierls Transition in the extended Peierls-Hubbard model

1997-11-25

arxiv.org/abs/cond-mat/9711266v1

Physical Review B 57, 11838 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages with 3 embedded eps figures

Scientific paper

10.1103/PhysRevB.57.11838

The one-dimensional extended Peierls-Hubbard model is studied at several band fillings using the density matrix renormalization group method. Results show that the ground state evolves from a Mott-Peierls insulator with a correlation gap at half-filling to a soliton lattice with a small band gap away from half-filling. It is also confirmed that the ground state of the Peierls-Hubbard model undergoes a transition to a metallic state at finite doping. These results show that electronic correlations effects should be taken into account in theoretical studies of doped polyacetylene. They also show that a Mott-Peierls theory could explain the insulator-metal transition observed in this material.

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