CHARGE SUSCEPTIBILITY AND CHARGE CORRELATION-FUNCTION IN THE D-P MODEL

被引：9

作者：

KOBAYASHI, A ^{[1
]}

AZAMI, M ^{[1
]}

ONO, Y ^{[1
]}

MATSUURA, T ^{[1
]}

KURODA, Y ^{[1
]}

MIURA, K ^{[1
]}

机构：

[1] KYUSHU INST TECHNOL,DEPT MECH SYST ENGN,FUKUOKA 820,JAPAN

来源：

PHYSICA C | 1995年 / 250卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(95)00360-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The properties of the charge fluctuation are investigated in the d-p model with the repulsion U-pd between holes on the nearest-neighbor Cu and O sites and the infinite on-site repulsion U-d at the Cu site. We calculate the charge susceptibility chi(c)(q, i omega(n)) and the charge correlation function S-c(q)=T Sigma(omega n)chi(c)(q, i omega(n)). It is found that S-c(q) has a peak at the Gamma point and a maximum in a ring around the Gamma point. The former is due to T chi(c)(q, 0). Its intensity is proportional to temperature T and strongly enhanced by U-pd. The latter is due to T Sigma(omega n not equal 0)chi(c)(q, i omega(n)) and shows a weak T and U-pd dependence. The intensity of the diffuse X-ray scattering on taking the charge fluctuation into account is also calculated. The result is consistent with the experiments in La2-deltaSrdeltaCuO4.

引用

页码：307 / 319

页数：13

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