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 |
| 巻 | 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 2002 → 8 6 2002 |
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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
}
TY - JOUR
T1 - FLEX Study on the compressibility of the two-dimensional Hubbard model
AU - Morita, Kunihisa
AU - Maebashi, Hideaki
AU - Miyake, Kazumasa
PY - 2002/3/1
Y1 - 2002/3/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0036503776&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036503776&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(01)01532-0
DO - 10.1016/S0921-4526(01)01532-0
M3 - Conference article
AN - SCOPUS:0036503776
VL - 312-313
SP - 547
EP - 549
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
ER -