ANOMALOUSLY HIGH ``MOBILITY'' IN SEMICONDUCTORS
- 1 March 1971
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 18 (5) , 205-208
- https://doi.org/10.1063/1.1653626
Abstract
In this paper we present a simple model for an inhomogeneous semiconductor which leads to an anomalously high apparent mobility. The model consists of a cylindrically symmetric van der Pauw measurement with a conducting inhomogeneity. This model is analyzed quantitatively and verified experimentally for several measurement configurations. The results cast doubt on the use of a high mobility as an indication of the quality of a semiconductor unless the homogeneity is unambiguously determined or the magnetic field dependence of the Hall constant is carefully examined.Keywords
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