MAGNETORESISTANCE AND HALL RESISTANCE IN A 1D PERIODICALLY MODULATED 2-DIMENSIONAL ELECTRON-GAS

被引：4
|
作者：
VASILOPOULOS, P [1 ]
PEETERS, FM [1 ]
机构：
[1] UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM
来源：
SURFACE SCIENCE | 1990年 / 229卷 / 1-3期
基金：
加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1016/0039-6028(90)90843-W
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A theoretical description is given of the novel magneto-resistance oscillations observed recently in a weak one-dimensional (1D) periodically modulated two-dimensional electron gas (2DEG). The bandwidth of the modulation-broadened Landau levels at the Fermi energy oscillates with magnetic field giving rise to the observed oscillations in the resistance. The magneto-resistance oscillations perpendicular to the modulation (ρxx) are dominated by diffusion current contributions which are proportional to the square of the bandwidth while the magneto-resistance parallel to the modulation (ρyy) results from collisional contributions to the current and is small for large bandwidths. ρyy and ρxx oscillate out of phase as observed. New oscillations in the Hall resistance, the cyclotron resonance position, and the linewidth are predicted. © 1990.
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收藏
页码：96 / 100
页数：5
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