FLEX Study on the compressibility of the two-dimensional Hubbard model

Kunihisa Morita, Hideaki Maebashi, Kazumasa Miyake

研究成果: ジャーナルへの寄稿Conference article

1 引用 (Scopus)

抄録

We investigate, on the basis of the fluctuation exchange (FLEX) approximation, a hole-number dependence of the compressibility in the two-dimensional t-t′-U Hubbard model. We choose a value of U near the critical Coulomb interaction of the antiferromagnetic transition, where the shape of the renormalized Fermi surface is deformed showing the tendency of nesting. It is found that, near half-filling, the charge susceptibility χc = ∂n/∂μ is larger about three times than the value given by the renormalized RPA, χc = Π0/(1+UΠ0), where Π0 is the polarization function calculated by FLEX approximation.

元の言語英語
ページ(範囲)547-549
ページ数3
ジャーナルPhysica B: Condensed Matter
312-313
DOI
出版物ステータス出版済み - 3 1 2002
イベントInternational Conference on Strongly Correlated Electrons - Ann Arbor, MI, 米国
継続期間: 8 6 20028 6 2002

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Hubbard model
Fermi surface
Electron transitions
Coulomb interactions
two dimensional models
Compressibility
compressibility
Polarization
approximation
Fermi surfaces
tendencies
magnetic permeability
polarization
interactions

All Science Journal Classification (ASJC) codes

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

これを引用

FLEX Study on the compressibility of the two-dimensional Hubbard model. / Morita, Kunihisa; Maebashi, Hideaki; Miyake, Kazumasa.

:: Physica B: Condensed Matter, 巻 312-313, 01.03.2002, p. 547-549.

研究成果: ジャーナルへの寄稿Conference article

Morita, Kunihisa ; Maebashi, Hideaki ; Miyake, Kazumasa. / FLEX Study on the compressibility of the two-dimensional Hubbard model. :: Physica B: Condensed Matter. 2002 ; 巻 312-313. pp. 547-549.
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