A possible role of D^- band in hopping conductivity and metal-insulator transition in 2D structures

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A simple two-band model is suggested explaining recently reported unusual features for hopping magnetoresistance and the metal-insulator transition in 2D structures. The model implies that the conductivity is dominated by the upper Hubbard band (D^- band). Experimental studies of hopping magnetoresistance for Si delta doped GaAs/AlGaAs heterostructure give additional evidences for the model.
13 pages, 3 gif-figures

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Mesoscale and Nanoscale Physics, Disordered Systems and Neural Networks

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http://salesiana.dossiersoluciones.com/handle/123456789/29988

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9911450
 http://arxiv.org/abs/cond-mat/9911450

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arXiv