MEAN-FIELD THEORY OF MIXED-VALENCE CONDUCTORS (R1, R2-DCNQI)2 CU

被引：24

作者：

SUZUMURA, Y

FUKUYAMA, H

机构：

[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

[2] UNIV TOKYO,FAC SCI,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1992年 / 61卷 / 09期

关键词：

D O I：

10.1143/JPSJ.61.3322

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The insulating state of (R1, R2-DCNQI)2Cu salts showing both the mixed valence of Cu+ and Cu++ and the three-fold lattice distortion has been examined by the mean-field theory to the periodic Anderson model where two one-dimensional conduction bands with the electron-phonon interaction are coupled to Cu ions. For the choice of the interaction constant which leads to approximately Cu+4/3 as an average, it is shown that modulations of both charge density and spin density coexist in the ground state and that the phase transition at finite temperature is of the first order.

引用

页码：3322 / 3330

页数：9

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