QUANTUM POINT CONTACT AS A LOCAL PROBE OF THE ELECTROSTATIC POTENTIAL CONTOURS

被引：58

作者：

WILLIAMSON, JG

TIMMERING, CE

HARMANS, CJPM

HARRIS, JJ

FOXON, CT

机构：

[1] DELFT UNIV TECHNOL,DEPT APPL PHYS,2600 GA DELFT,NETHERLANDS

[2] PHILIPS RES LABS,REDHILL RH1 5HA,SURREY,ENGLAND

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.42.7675

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Quantum point contacts, shifted laterally by ±50 nm have been used to study the local electrostatic potential in the two-dimensional electron gas of a GaAs-AlxGa1-xAs heterostructure. The resistance of the quantized plateaux is observed to vary with this lateral position. In one device an alternate suppression of the quantized resistance plateaux is observed, which we interpret as being due to an overlap of strong local potential fuctuations with the transverse profile of the wave functions in the quantum point contact. © 1990 The American Physical Society.

引用

页码：7675 / 7678

页数：4

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