Charge ordering and spin gap in NaV2O5

被引：172

作者：

Seo, H ^{[1
]}

Fukuyama, H ^{[1
]}

机构：

[1] Univ Tokyo, Fac Sci, Dept Phys, Tokyo 1130033, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 08期

关键词：

NaV2O5; spin gap; charge ordering; Hartree approximation; spin-Peierls; charge disproportionation;

D O I：

10.1143/JPSJ.67.2602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A possible ground state of NaV2O5 is proposed based on the Hartree approximation for both on-site and intersite Coulomb interactions. The results indicate that the intersite Coulomb interaction induces a zigzag type of charge disproportionation (i.e., charge ordering) along the ladders of V ions, resulting in localized spins between neighboring ladders to form a spin gap. This new state, which is different from the spin-Peierls state so far believed, seems to be consistent with the existing experimental results.

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页码：2602 / 2605

页数：4

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