ANTIFERROMAGNETISM AND INCOMMENSURATE STRUCTURE IN THE 3-BAND HUBBARD-MODEL

被引：26

作者：

DOPF, G ^{[1
]}

MURAMATSU, A ^{[1
]}

HANKE, W ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, HOCHSTLEISTUNGSRECHENZENTRUM, W-5170 JULICH 1, GERMANY

来源：

EUROPHYSICS LETTERS | 1992年 / 17卷 / 6BIS期

关键词：

HEISENBERG AND OTHER QUANTIZED LOCALIZED SPIN MODELS; GENERAL THEORIES AND COMPUTATIONAL TECHNIQUES;

D O I：

10.1209/0295-5075/17/6/014

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic properties of the three-band Hubbard model were studied using both a quantum Monte Carlo canonical projector method as well as the finite-temperature grand canonical approach. System sizes up to 10 x 10 unit cells (each cell consisting of three sites) and inverse temperatures (projection parameters) up to beta = 30 (THETA = 80) are simulated. We find antiferromagnetic long-range order (AFLRO) in the undoped case (1 hole/elementary cell) both for small and large values of the charge-transfer energy. Doping destroys the AFLRO and an incommensurate structure is found with a wavevector along the (1, 0) line.

引用

页码：559 / 564

页数：6

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