Tuning nonlinear charge transport between integer and fractional Quantum Hall states

RODDARO, S.; PARADISO, N.; PELLEGRINI, V.; BIASIOL, G.; SORBA, L.; BELTRAM, Fabio

doi:10.1103/PhysRevLett.103.016802

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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

Titolo:	Tuning nonlinear charge transport between integer and fractional Quantum Hall states
Autori:	S. RODDARO N. PARADISO V. PELLEGRINI G. BIASIOL L. SORBA BELTRAM, Fabio mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2009
Rivista:	PHYSICAL REVIEW LETTERS
Abstract:	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
Handle:	http://hdl.handle.net/11384/6148
Appare nelle tipologie:	1.1 Articolo in rivista

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http://hdl.handle.net/11384/6148

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