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Mobility edge scaling at semiclassical and dissipative Hall transitions | | Joel E. Moore
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24 Apr 2002 | | Subject: | cond-mat | | Abstract: | The universal anomalous diffusion scaling is obtained for the semiclassical quantum Hall transition, which has been argued to describe samples with dissipation or correlated impurities. The results explain a discrepancy between existing numerics and the expected scaling $eta = 2 x_1 = {1/2}$, which is violated because of a cancellation in the scaling function. The crossover with increasing observation time from semiclassical to quantum scaling is shown to explain a recent experiment which finds different scaling laws depending on how the localization length is extracted. | | Source: | arXiv, cond-mat/0204508 | | Services: | Forum | Review | PDF | Favorites | |
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