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

Deviatov, E. V.; Lorke, A.; Wegscheider, W.

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

Authors

Deviatov, E. V.

Lorke, A.

Wegscheider, W.

Description

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 $ν_c=1$ incompressible strip is determined in normal and tilted magnetic fields.