On the acoustoelectric current in a one-dimensional channel

被引：84

作者：

Shilton, JM ^{[1
]}

Mace, DR ^{[1
]}

Talyanskii, VI ^{[1
]}

Galperin, Y ^{[1
]}

Simmons, MY ^{[1
]}

Pepper, M ^{[1
]}

Ritchie, DA ^{[1
]}

机构：

[1] UNIV OSLO,DEPT PHYS,N-0316 OSLO,NORWAY

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1996年 / 8卷 / 24期

关键词：

D O I：

10.1088/0953-8984/8/24/001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report the first observation of the direct current induced by a surface acoustic wave through a quantum point contact defined in a GaAs-AlGaAs two-dimensional electron gas by means of a split gate. We have observed giant oscillations in the acoustoelectric current as a function of gate voltage, with minima corresponding to the plateaux in quantum point contact conductivity. A theoretical consideration is presented which explains the observed peaks in terms of the matching of sound velocity with electron velocity in the upper one-dimensional subband of the quantum point contact.

引用

页码：L337 / L343

页数：7

共 18 条

[1]

AMONE DD, 1995, APPL PHYS LETT, V66, P3149

[2]

DAVIES JH, 1994, HETEROSTRUCTURES QUA, P385

[3] QUANTIZATION OF THE ACOUSTOELECTRIC CURRENT IN A 2-DIMENSIONAL ELECTRON-SYSTEM IN A STRONG MAGNETIC-FIELD [J].