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Local investigation of the energy gap within the incompressible strip in the quantum Hall regime |
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| Authors: | E V Deviatov A Lorke G Biasiol L Sorba and W Wegscheider |
| Affiliation: | 1.Institute of Solid State Physics,Russian Academy of Sciences,Chernogolovka, Moscow region,Russia;2.Laboratorium für Festk?rperphysik,Universit?t Duisburg-Essen,Duisburg,Germany;3.Laboratorio TASC, CNR-IOM,Trieste,Italy;4.NEST,Istituto Nanoscienze and Scuola Normale Superiore,Pisa,Italy;5.Laboratory for Solid State Physics,ETH Zürich,Zürich,Switzerland |
| Abstract: | We experimentally study the energy gap within the incompressible strip at local filling factor ν c = 1 at the quantum Hall edge for samples of very different mobilities. The obtained results indicate strong enhancement of the energy gap in comparison to the single-particle Zeeman splitting. We identify the measured gap as a mobility gap, so a pronounced experimental in-plane magnetic field dependence can both be attributed to the spin effects as well as to the change in the energy levels broadening. |
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