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Energy spectrum reconstruction at the edge of a two-dimensional electron system with strong spin-orbit coupling

By A. Kononov, G. Biasiol, L. Sorba and E. V. Deviatov


We experimentally demonstrate the simultaneous reconstruction of the bulk and the edge energy spectra caused by strong spin-orbit interaction, at the two lowest filling factors $\nu=1$ and $\nu=2$ for $In_xGa_{1-x}As$ two-dimensional electron system with $x = 0.75$. The observed reconstruction is of different character at these filling factors: it is characterized by zeroing of the energy gap at the levels crossing point at $\nu=2$, while the reconstruction at $\nu=1$ goes through the coexistence of two $\nu=1$ quantum Hall phases with different spin projections. An analysis indicates a strong influence of many-body interaction on the reconstruction at $\nu=1$.Comment: 6 page

Topics: Condensed Matter - Mesoscale and Nanoscale Physics
Year: 2012
DOI identifier: 10.1103/PhysRevB.86.125304
OAI identifier:

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