SPIN FLUCTUATIONS AND COVALENCE IN THE HALF-FILLED NARROW-BAND HUBBARD-MODEL

被引：18

作者：

KAPLAN, TA ^{[1
]}

MAHANTI, SD ^{[1
]}

CHANG, HJ ^{[1
]}

机构：

[1] MICHIGAN STATE UNIV,CTR FUNDAMENTAL MAT RES,E LANSING,MI 48824

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.45.2565

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the spin density within the widely accepted model for the insulating parents (La2CuO4 and YBa2Cu3O6) of the superconducting cuprates, namely, the half-filled narrow-one-band Hubbard model as mapped from the three-band model for the CuO2 planes. The result, which includes quantum spin fluctuations and covalence simultaneously, disagrees strongly with neutron-diffraction results. Possible remedies are discussed. A reinterpretation of the neutron data on these insulators gives considerable, but insufficient, improvement.

引用

页码：2565 / 2568

页数：4

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