Quantum Hall line junction with impurities as a multislit Luttinger liquid interferometer

I. Yang, W. Kang, L. N. Pfeiffer, K. W. Baldwin, K. W. West, E. A. Kim, E. Fradkin

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Abstract

We report on quantum interference between a pair of counterpropagating quantum Hall edge states that are separated by a high-quality tunnel barrier. Observed Aharonov-Bohm oscillations are analyzed in terms of resonant tunneling between coupled Luttinger liquids which creates bound electronic states between pairs of tunnel centers that act like interference slits. We place a lower bound in the range of 20-40 μm for the phase coherence length and directly confirm the extended phase coherence of quantum Hall edge states.

Original languageEnglish
Article number113312
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number11
DOIs
StatePublished - 15 Mar 2005

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