CHARACTERIZATION OF THE SURFACE ACOUSTIC-WAVE INDUCED POTENTIAL IN A GAAS/ALGAAS HETEROSTRUCTURE

被引：11

作者：

CAMPBELL, JWM

GUILLON, F

DIORIO, M

BUCHANAN, M

STONER, RJ

机构：

[1] NATL RES COUNCIL CANADA,IMS,OTTAWA K1A 0R6,ONTARIO,CANADA

[2] BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 84卷 / 07期

关键词：

D O I：

10.1016/0038-1098(92)90469-P

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on magnetotransport measurements performed at 1.7 K on the two-dimensional electron system (2DES) in GaAs/AlGaAs heterojunctions. The standard DC conductivity computed from simultaneous measurements of rho(xx) and rho(xy) is compared with an AC potential which is measured at the pulse frequency of a pulsed radio-frequency surface acoustic wave (SAW). This AC potential has maxima at both the integer and fractional quantum Hall minima of the DC conductivity, with amplitude directly proportional to the width of the SAW pulse. We conclude that the AC potential is a direct result of the interaction between the 2DES and the SAW.

引用

页码：735 / 738

页数：4

共 8 条

[1] ACOUSTOELECTRIC CURRENT QUANTUM OSCILLATIONS IN LINBO3-BISB LAYERED STRUCTURE [J].