Interference effects in transport across a single incompressible strip at the edge of the fractional quantum Hall system

被引：6

作者：

Deviatov, E. V. ^{[1
]}

Marquardt, B. ^{[2
]}

Lorke, A. ^{[2
]}

Biasiol, G. ^{[3
]}

Sorba, L. ^{[3
,4
,5
]}

机构：

[1] Inst Solid State Phys RAS, Chernogolovka 142432, Russia

[2] Univ Duisburg Essen, Festkorperphys Lab, D-47048 Duisburg, Germany

[3] Lab Nazl TASC INFM CNR, I-34012 Trieste, Italy

[4] NEST INFM CNR, I-56126 Pisa, Italy

[5] Scuola Normale Super Pisa, I-56126 Pisa, Italy

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 12期

关键词：

aluminium compounds; gallium arsenide; III-V semiconductors; oscillations; quantum Hall effect; FILLING FACTORS; STATES; CHANNELS; EXCITATIONS; HIERARCHY; LIQUIDS; REGIME; FLUID;

D O I：

10.1103/PhysRevB.79.125312

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We experimentally investigate interference effects in transport across a single incompressible strip at the edge of the quantum Hall system by using a Fabry-Perot type interferometer. We find the interference oscillations in transport across the incompressible strips with local filling factors nu(c)=1,4/3,2/3 even at high imbalances, exceeding the spectral gaps. In contrast, there is no sign of the interference in transport across the principal Laughlin nu(c)=1/3 incompressible strip. This indicates, that even at fractional nu(c), the interference effects are caused by "normal" electrons. The oscillation's period is determined by the effective interferometer area, which is sensitive to the filling factors because of screening effects.

引用

页数：7

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