Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer

Ouchni F, Schnack J, Schulenburg J (2007)
Physical Review B 76(19): 195106-195106.

Journal Article | Published | English

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Abstract
An extended Hubbard model that includes not only on-site but also intersite Coulomb repulsion and distant transfer is numerically investigated using the exact Lanczos diagonalization method for finite-size systems up to L=20 sites. The aim is to study the charge order and unconditional dimerization of a chain at density rho=0.4. From the analysis of the spin and charge correlation functions, we deduce the formation of a dimer insulating state which is a Wigner lattice-type charge ordered state. The next-nearest-neighbor hopping t(2) enhances the intradimer correlations and weakens the interdimer correlations. Implications for the CuO2 chains in Sr14Cu24O41 are discussed.
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Ouchni F, Schnack J, Schulenburg J. Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer. Physical Review B. 2007;76(19):195106-195106.
Ouchni, F., Schnack, J., & Schulenburg, J. (2007). Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer. Physical Review B, 76(19), 195106-195106.
Ouchni, F., Schnack, J., and Schulenburg, J. (2007). Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer. Physical Review B 76, 195106-195106.
Ouchni, F., Schnack, J., & Schulenburg, J., 2007. Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer. Physical Review B, 76(19), p 195106-195106.
F. Ouchni, J. Schnack, and J. Schulenburg, “Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer”, Physical Review B, vol. 76, 2007, pp. 195106-195106.
Ouchni, F., Schnack, J., Schulenburg, J.: Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer. Physical Review B. 76, 195106-195106 (2007).
Ouchni, Fatiha, Schnack, Jürgen, and Schulenburg, Jörg. “Exact diagonalization of a one-dimensional Hubbard model at density rho=0.4: Effects of Coulomb repulsions and distant transfer”. Physical Review B 76.19 (2007): 195106-195106.
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