MAGNETIC-INTERACTIONS AND DYNAMICS OF HOLES IN CUO2 PLANES OF HIGH-TC SUPERCONDUCTING MATERIALS

被引：22

作者：

HIZHNYAKOV, V ^{[1
]}

SIGMUND, E ^{[1
]}

SCHNEIDER, M ^{[1
]}

机构：

[1] ACAD SCI ESSSR,INST PHYS,TARTU 202400,ESTONIA,USSR

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.44.795

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Starting from the two-band Hubbard Hamiltonian a systematic derivation of the spin-dependent interactions within the CuO2 planes of the perovskite high-T(c) superconductors is presented, taking the remarkably strong Cu-O hybridization of these materials into account. We show that in the case of hole doping the kinetic energy of the holes plays a dominant role leading to a ferromagnetic ordering in the surrounding of an additional hole (ferron state). In addition we show that any reduction of the two-band model to a one-band model clearly underestimates the influence of the kinetic energy of the holes.

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页码：795 / 800

页数：6

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