HIGH-FIELD MAGNETORESISTANCE IN A PERIODICALLY MODULATED 2-DIMENSIONAL ELECTRON-GAS

被引：22
|
作者：
GEIM, AK
TABORYSKI, R
KRISTENSEN, A
DUBONOS, SV
LINDELOF, PE
机构：
[1] ACAD SCI,INST MICROELECTR TECHNOL,CHERNOGOLOLOVKA 142432,USSR
[2] UNIV COPENHAGEN,HC ORSTED INST,PHYS LAB,DK-2100 COPENHAGEN,DENMARK
来源：
PHYSICAL REVIEW B | 1992年 / 46卷 / 07期
关键词：
D O I：
10.1103/PhysRevB.46.4324
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have extended earlier measurements of the magnetoresistance in a periodically modulated two-dimensional electron gas to high magnetic fields, where the cyclotron radius, r(c), is much smaller than the period, a, of modulation. A giant nonoscillatory magnetoresistance was found to arise beyond the range of low-field (Weiss) oscillations periodic in 1/B. Its value in a magnetic field of a few tesla may exceed the zero-field resistance value, rho-0, by 1 to 2 orders of magnitude. This result is in agreement with the semiclassical theory by Beenakker, if a modulation of the electron mobility is taken into account.
引用
收藏
页码：4324 / 4327
页数：4
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