1207.1627 (A. Kononov et al.)

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

A. Kononov, G. Biasiol, L. Sorba, 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 $\nu=1$.

View original: http://arxiv.org/abs/1207.1627