Electron transport properties in high-purity Ge down to cryogenic temperatures

Details Electron transport properties in high-purity Ge down to cryogenic temperatures Electron transport properties in high-purity Ge down to cryogenic temperatures

2010-10-05

arxiv.org/abs/1010.0961v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

24 pages, 11 figures

Scientific paper

Electron transport in Ge at various temperatures down to 20 mK has been investigated using particle Monte Carlo simulation taking into account ionized impurity and inelastic phonon scattering. The simulations account for the essential features of electron transport at cryogenic temperature: Ohmic regime, anisotropy of the drift velocity relative to the direction of the electric field, as well as a negative differential mobility phenomenon along the <111> field orientation. Experimental data for the electron velocities are reproduced with a satisfactory accuracy. Examples of electron position in the real space during the simulations are given and evidence separated clouds of electrons propagating along different directions depending on the valley they belong.

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