Dimerization in a half-filled one-dimensional extended Hubbard model

Details Dimerization in a half-filled one-dimensional extended Hubbard model Dimerization in a half-filled one-dimensional extended Hubbard model

2004-01-26

arxiv.org/abs/cond-mat/0401494v1

Phys. Rev. Lett. 92, 246404 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevLett.92.246404

We use a density matrix renormalization group method to study quantitatively the phase diagram of a one-dimensional extended Hubbard model at half-filling by investigating the correlation functions and structure factors. We confirm the existence of a novel narrow region with long-rang bond-order-wave order which is highly controversial recently between the charge-density-wave phase and Mott insulator phase. We determined accurately the position of the tricritical point $U_t\simeq 7.2t$, $V_t\simeq 3.746t$ which is quite different from previous studies.

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