COLLECTIVE EXCITATIONS OF A 2-DIMENSIONAL ELECTRON-GAS IN A 2-DIMENSIONAL MAGNETIC-FIELD MODULATION

被引：23
|
作者：
WU, XG [1 ]
ULLOA, SE [1 ]
机构：
[1] OHIO UNIV,CONDENSED MATTER & SURFACE SCI PROGRAM,ATHENS,OH 45701
来源：
PHYSICAL REVIEW B | 1993年 / 47卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.47.10028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the collective excitations of a two-dimensional electron gas in the presence of a spatia y periodic magnetic field. Both frequency and oscillator strength of the excitations are calculated, and their dependences on the wave vector and magnetic-field strength are investigated. We focus on the regime where the uniform and modulation components of the field have the same strength, and the magnetic flux per unit cell is a few times the fundamental quantum flux hc/e. The possibility of observing the Hofstadter-type spectrum is discussed.
引用
收藏
页码：10028 / 10031
页数：4
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