Hofstadter butterflies for flat bands

被引：107
作者：
Aoki, H
Ando, M
Matsumura, H
机构：
[1] Department of Physics, University of Tokyo, Tokyo 113, Hongo
来源：
PHYSICAL REVIEW B | 1996年 / 54卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.54.R17296
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hofstadter's diagram (the energy spectrum against the magnetic field in tight-binding systems) is obtained for the models having flat one-electron band(s) that have originally been proposed for itinerant spin ferromagnetism. Magnetic fields preserve those flat bands that arise from a topological reason, while dispersions emerge in a singular manner for the flat bands arising from interference. This implies an anomalous orbital magnetism.
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页码：17296 / 17299
页数：4
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