SIGNIFICANCE OF NONORTHOGOANLITY IN TIGHT-BINDING MODELS .2. THE POSSIBILITY OF HIGH-T-C SUPERCONDUCTIVITY IN INTERCALATION COMPOUNDS

被引：8

作者：

CHOY, TC

MCKINNON, BA

机构：

[1] Department of Physics, Monash University, Clayton

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.52.14539

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using the Lowdin transformation from nonorthogonal atomic orbitals to orthogonal Wannier orbitals for the tight-binding model with many-body interactions, we derive the t-J model for graphite. We demonstrate the significance of nonorthogonality on the parameters t and J. We obtain a mean field phase diagram for the critical temperature T-c versus the doping fraction using an auxiliary slave-boson method. We compare the stabilization of the superconducting phase transition via a weak interlayer coupling with a Kosterlitz-Thouless two-dimensional dilute Bose gas condensation. It is concluded that graphite intercalation compounds form a testing ground for the t-J model of high T-c superconductivity independent of the cuprates.

引用

页码：14539 / 14543

页数：5

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