Abstract
Drift and diffusion properties of electrons in superlattices in the negative differential mobility region and beyond are investigated by Monte Carlo simulations based on the Wannier-Stark approach. At the highest applied fields we found that the diffusion coefficient departs from Einstein law to achieve values controlled by a characteristic length comparable with the lattice period. This size effect is accompanied by quantum effects associated with intra- and inter-band transitions assisted by phonon interactions typical of the hopping transport regime.
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© 2006 Springer-Berlag Berlin Heidelberg
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Rosini, M., Reggiani, L. (2006). Drift and Diffusion in Superlattices Within the Wannier-Stark Approach. In: Saraniti, M., Ravaioli, U. (eds) Nonequilibrium Carrier Dynamics in Semiconductors. Springer Proceedings in Physics, vol 110. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-36588-4_76
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DOI: https://doi.org/10.1007/978-3-540-36588-4_76
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-36587-7
Online ISBN: 978-3-540-36588-4
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