期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.016802
关键词
-
资金
- Italian Ministry of Research [RBIN045MNB]
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.
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