Separately contacted edge states at high imbalance in the integer and fractional quantum Hall effect regime

Details Separately contacted edge states at high imbalance in the integer and fractional quantum Hall effect regime Separately contacted edge states at high imbalance in the integer and fractional quantum Hall effect regime

2008-03-18

arxiv.org/abs/0803.2612v1

phys. stat. sol. (b) 245, 366 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 13 figures

Scientific paper

10.1002/pssb.200743341

This review presents experimental results on the inter-edge-state transport in the quantum Hall effect, mostly obtained in the regime of high imbalance. The application of a special geometry makes it possible to perform I-V spectroscopy between individual edge channels in both the integer and the fractional regime. This makes it possible to study in detail a number of physical effects such as the creation of topological defects in the integer quantum Hall effect and neutral collective modes excitation in fractional regime. The while many of the experimental findings are well explained within established theories of the quantum Hall effects, a number of observations give new insight into the local structure at the sample edge, which can serve as a starting point for further theoretical studies.

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