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EnglishControllable 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: | |
| Data di pubblicazione: | 2009 |
| Rivista: | |
| 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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