Spin susceptibility of one-dimensional extended Hubbard model at quarter filling

Y. Tanaka; M. Ogata

doi:10.1016/j.physb.2006.01.115

Spin susceptibility of one-dimensional extended Hubbard model at quarter filling

Y. Tanaka^*, M. Ogata

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The ground-state property of one-dimensional extended Hubbard model is investigated at quarter filling. By using spin-charge factorized wave function in the U → ∞ limit, the effective exchange coupling J_eff and spin susceptibility χ are calculated as a function of nearest-neighbor Coulomb interaction V. It is found that J_eff is suppressed by the effect of V through charge fluctuation. The results indicate these quantities have no singularities at the transition point because of the Berezinskii-Kosterlitz-Thouless-type transition of charge ordering. We also confirm the results by exact diagonalization method in the realistic parameter range. The relevance to the experiments on quasi one-dimensional organic conductor ( DI-DCNQI )₂ Ag is discussed.

Original language	English
Pages (from-to)	317-318
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.115
Publication status	Published - 2006 May 1
Externally published	Yes

Keywords

Charge order
Spin susceptibility

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2006.01.115

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title = "Spin susceptibility of one-dimensional extended Hubbard model at quarter filling",

abstract = "The ground-state property of one-dimensional extended Hubbard model is investigated at quarter filling. By using spin-charge factorized wave function in the U → ∞ limit, the effective exchange coupling Jeff and spin susceptibility χ are calculated as a function of nearest-neighbor Coulomb interaction V. It is found that Jeff is suppressed by the effect of V through charge fluctuation. The results indicate these quantities have no singularities at the transition point because of the Berezinskii-Kosterlitz-Thouless-type transition of charge ordering. We also confirm the results by exact diagonalization method in the realistic parameter range. The relevance to the experiments on quasi one-dimensional organic conductor ( DI-DCNQI )2 Ag is discussed.",

keywords = "Charge order, Spin susceptibility",

author = "Y. Tanaka and M. Ogata",

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doi = "10.1016/j.physb.2006.01.115",

language = "English",

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T1 - Spin susceptibility of one-dimensional extended Hubbard model at quarter filling

AU - Tanaka, Y.

AU - Ogata, M.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - The ground-state property of one-dimensional extended Hubbard model is investigated at quarter filling. By using spin-charge factorized wave function in the U → ∞ limit, the effective exchange coupling Jeff and spin susceptibility χ are calculated as a function of nearest-neighbor Coulomb interaction V. It is found that Jeff is suppressed by the effect of V through charge fluctuation. The results indicate these quantities have no singularities at the transition point because of the Berezinskii-Kosterlitz-Thouless-type transition of charge ordering. We also confirm the results by exact diagonalization method in the realistic parameter range. The relevance to the experiments on quasi one-dimensional organic conductor ( DI-DCNQI )2 Ag is discussed.

AB - The ground-state property of one-dimensional extended Hubbard model is investigated at quarter filling. By using spin-charge factorized wave function in the U → ∞ limit, the effective exchange coupling Jeff and spin susceptibility χ are calculated as a function of nearest-neighbor Coulomb interaction V. It is found that Jeff is suppressed by the effect of V through charge fluctuation. The results indicate these quantities have no singularities at the transition point because of the Berezinskii-Kosterlitz-Thouless-type transition of charge ordering. We also confirm the results by exact diagonalization method in the realistic parameter range. The relevance to the experiments on quasi one-dimensional organic conductor ( DI-DCNQI )2 Ag is discussed.

KW - Charge order

KW - Spin susceptibility

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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Spin susceptibility of one-dimensional extended Hubbard model at quarter filling

Abstract

Keywords

ASJC Scopus subject areas

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