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Hot carrier transport in modulation doped Si/SiGe and Ge/SiGe heterostructures

Madhavi, S and Venkataraman, V (2000) Hot carrier transport in modulation doped Si/SiGe and Ge/SiGe heterostructures. In: Thin Solid Films, 369 (1-2). pp. 333-337.

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In this paper we report studies carried out on 2D electrons in strained silicon and 2D holes in strained germanium channel modulation doped heterostructures, to understand their high field transport properties. Geometric magnetoresistance technique was used to measure the mobility as a function of the applied field up to 300 V/cm and for lattice temperatures from 10 to 160 K. We observe that at high fields the mobility decreases at a faster rate in the germanium channels compared with silicon channels. Empirical relations were fitted to the data. Theoretical calculations using Boltzmann transport theory and Green's function for non-linear transport at high fields are also presented. We find that the Green's function approach is better suited to explain the hot carrier mobility degradation in these high mobility samples

Item Type: Journal Article
Publication: Thin Solid Films
Publisher: Elsevier
Keywords: Hot carrier transport;Geometric magnetoresistance;Two-dimensional effects;Phonon confinement
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 12 Mar 2007
Last Modified: 19 Sep 2010 04:36
URI: http://eprints.iisc.ac.in/id/eprint/10334

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