Tuning Nonlinear Charge Transport between Integer and Fractional Quantum Hall States

被引：22

作者：

Roddaro, Stefano ^{[1
,2
]}

Paradiso, Nicola ^{[1
,2
]}

Pellegrini, Vittorio ^{[1
,2
]}

Biasiol, Giorgio ^{[3
]}

Sorba, Lucia ^{[1
,2
,3
]}

Beltram, Fabio ^{[1
,2
]}

机构：

[1] Scuola Normale Super Pisa, NEST, I-56126 Pisa, Italy

[2] INFM, CNR, I-56126 Pisa, Italy

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

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 01期

关键词：

LUTTINGER LIQUID; EDGE;

D O I：

10.1103/PhysRevLett.103.016802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Controllable point junctions between different quantum Hall phases are a necessary building block for the development of mesoscopic circuits based on fractionally charged quasiparticles. We demonstrate how particle-hole duality can be exploited to realize such point-contact junctions. We show an implementation for the case of two quantum Hall liquids at filling factors nu=1 and nu(*)< 1 in which both the fractional filling nu(*) and the coupling strength can be finely and independently tuned. A peculiar crossover from insulating to conducting behavior as nu(*) goes from 1/3 to 1 is observed. These results highlight the key role played on interedge tunneling by local charge depletion at the point contact.

引用

页数：4

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