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Compressibility stripes for mesoscopic quantum Hall samples
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Sohrmann, C. and Roemer, Rudolf A. (2007) Compressibility stripes for mesoscopic quantum Hall samples. New Journal of Physics, Vol.9 . Article: 97. doi:10.1088/1367-2630/9/4/097 ISSN 1367-2630.
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Official URL: http://dx.doi.org/10.1088/1367-2630/9/4/097
Abstract
We numerically investigate the interplay of disorder and electron electron interactions in the integer quantum Hall effect. In particular, we focus on the behaviour of the electronic compressibility as a function of magnetic field and electron density. We find manifestations of nonlinear screening and charging effects around integer filling factors, consistent with recent imaging experiments. Our calculations exhibit g-factor enhancement as well as strong overscreening in the centre of the Landau bands. Even though the critical behaviour appears mostly unaffected by interactions, important implications for the phase diagram arise. Our results are in very good agreement with the experimental findings and strongly support the relevance of electron - electron interactions for understanding integer quantum Hall physics.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | New Journal of Physics | ||||
Publisher: | IOP Publishing | ||||
ISSN: | 1367-2630 | ||||
Official Date: | 17 April 2007 | ||||
Dates: |
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Volume: | Vol.9 | ||||
Number of Pages: | 22 | ||||
Page Range: | Article: 97 | ||||
DOI: | 10.1088/1367-2630/9/4/097 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
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