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
收藏
页码：559 / 564
页数：6
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