Abstract
We report tilted-field transport measurements in the quantum Hall regime in an quantum well. We observe anticrossings of spin-split Landau levels, which suggest a mixing of spin states at Landau level coincidence. We propose that the level repulsion is due to the presence of spin-orbit and of band-nonparabolicity terms which are relevant in narrow-gap systems. Furthermore, electron-electron interaction is significant in our structure, as demonstrated by the large values of the interaction-induced enhancement of the electronic factor.
- Received 2 December 2004
DOI:https://doi.org/10.1103/PhysRevB.71.153314
©2005 American Physical Society