Interactions suppress Quasiparticle Tunneling at Hall Bar Constrictions

Details Interactions suppress Quasiparticle Tunneling at Hall Bar Constrictions Interactions suppress Quasiparticle Tunneling at Hall Bar Constrictions

2004-03-10

arxiv.org/abs/cond-mat/0403288v1

Phys. Rev. Lett. 93, 126801 (2004)

Physics

Condensed Matter

Superconductivity

4 pages

Scientific paper

10.1103/PhysRevLett.93.126801

Tunneling of fractionally charged quasiparticles across a two-dimensional electron system on a fractional quantum Hall plateau is expected to be strongly enhanced at low temperatures. This theoretical prediction is at odds with recent experimental studies of samples with weakly-pinched quantum-point-contact constrictions, in which the opposite behavior is observed. We argue here that this unexpected finding is a consequence of electron-electron interactions near the point contact.

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