Origin of the charge-ordered stripe with the orbital ordering in manganese oxides

被引：0

作者：

Mutou, T ^{[1
]}

Kontani, H

机构：

[1] RIKEN, Inst Phys & Chem Res, Magnet Mat Lab, Wako, Saitama 3510198, Japan

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

来源：

PHYSICA B | 2000年 / 281卷

关键词：

charge-ordered stripe; orbital-ordering manganite; Hartree-Fock approximation;

D O I：

10.1016/S0921-4526(99)01041-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The origin of the charge-ordered stripe with the orbital ordering observed experimentally in some manganese oxides is proposed. It is emphasized that the long-range Coulomb interaction plays an essential role. We study a Hubbard model with doubly degenerate orbitals, and treat the on-site Coulomb interaction (U) and the nearest-neighbor one (V) with the Hartree-Fock approximation. Charge-orbital stripe structures observed in experiments are reproduced in a wide region of the U-V phase diagram. The stability of the stripe structure is confirmed by perturbation theory. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：531 / 533

页数：3

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