Nonohmic conductivity as a probe of crossover from diffusion to hopping in two dimensions

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We show that the study of conductivity nonlinearity gives a possibility to determine the condition when the diffusion conductivity changes to the hopping one with increasing disorder. It is experimentally shown that the conductivity of single quantum well GaAs/InGaAs/GaAs heterostructures behaves like diffusive one down to value of order $10^{-2}e^2/h$.
4 pages, 2 figures

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Disordered Systems and Neural Networks

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http://salesiana.dossiersoluciones.com/handle/123456789/209280

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0312118
 http://arxiv.org/abs/cond-mat/0312118
 Physica E 25, 42 (2004)
 doi:10.1016/j.physe.2004.05.006

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arXiv