Imaging of integer quantum Hall edge state in a quantum point contact via scanning gate microscopy

被引：61

作者：

Aoki, N ^{[1
]}

da Cunha, CR

Akis, R

Ferry, DK

Ochiai, Y

机构：

[1] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA

[2] Arizona State Univ, Ctr Solid State Elect Res, Tempe, AZ 85287 USA

[3] Chiba Univ, Dept Elect & Mech Engn, Inage Ku, Chiba 2638522, Japan

[4] Tech Univ Vienna, Vienna, Austria

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.72.155327

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Integer quantum Hall edge states have been imaged in the constriction region of a quantum point contact fabricated in an InGaAs heterostructure at high magnetic fields using low-temperature scanning gate microscopy (SGM). Features in the SGM images grew wider and deeper as side gates squeezed the constriction. Furthermore, clear plateaus corresponding to the depopulation of edge states were observed. We propose a model for these images based on the variation of the local confinement potential induced by the tip.

引用

页数：4

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