Quantum Hall line junction with impurities as a multi-slit Luttinger liquid interferometer

Details Quantum Hall line junction with impurities as a multi-slit Luttinger liquid interferometer Quantum Hall line junction with impurities as a multi-slit Luttinger liquid interferometer

2004-07-23

arxiv.org/abs/cond-mat/0407641v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, 1 table

Scientific paper

10.1103/PhysRevB.71.113312

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 that 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 $\mu$m for the phase coherence length and directly confirm the extended phase coherence of quantum Hall edge states.

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