On the correllation effect in Peierls-Hubbard chains

Abstract

We reexamine the dimerization, the charge and the spin gaps of a half-filled Peierls-Hubbard chain by means of the incremental expansion technique. Our numerical findings are in significant quantitative conflict with recently obtained results by M. Sugiura and Y. Suzumura [J. Phys. Soc. Jpn. v. 71 (2002) 697] based on a bosonization and a renormalization group method, especially with respect to the charge gap. Their approach seems to be valid only in the weakly correlated case.

7pages,4figures(6eps-files)

References in corpus (4)

• Mott-Peierls Transition in the extended Peierls-Hubbard model
• Correlation Effect on Peierls Transition
• Solitonic approach to the dimerization problem in correlated one-dimensional systems
• Incremental expansions for Hubbard-Peierls systems

Cited by in corpus (5)

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• Magnetism of one-dimensional Wigner lattices and its impact on charge order