Manifestation of a complex edge excitation structure in the fractional quantum Hall regime at high filling factors

Details Manifestation of a complex edge excitation structure in the fractional quantum Hall regime at high filling factors Manifestation of a complex edge excitation structure in the fractional quantum Hall regime at high filling factors

2007-11-08

arxiv.org/abs/0711.1251v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We experimentally study equilibration across the sample edge at high fractional filling factors 4/3, 5/3 under experimental conditions, which allow us to obtain high imbalance conditions. We find a lack of the full equilibration across the edge even in the flat-band situation, where no potential barrier survives at the sample edge. We interpret this result as the manifestation of complicated edge excitation structure at high fractional filling factors 4/3, 5/3. Also, a mobility gap in the $\nu_c=1$ incompressible strip is determined in normal and tilted magnetic fields.

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