Quantitative mobility spectrum analysis (QMSA) for hall characterization of electrons and holes in anisotropic bands
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An extension of the quantitative mobility spectrum analysis (QMSA) procedure, which determines free electron and hole densities and mobilities from magnetic-field-dependent Hall and resistivity measurements, to materials exhibiting anisotropic conduction is presented. As test cases, the fully computer-automated procedure is used to analyze magnetotransport data from Bi thin films and Bi/CdTe superlattices. Using the results of the QMSA procedure, the thermoelectric properties of these films can be accurately modeled. As a second exmaple, an electron mobility anisotropy ratio of ≈4.5 is derived from the QMSA treatment of the Hall data for bulk Si samples.
Key wordsAnisotropic bands Bi/CdTe superlattices Bi films magnetotransport quantitative mobility spectrum analysis (QMSA) Si thermoelectric properties
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