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- W2038472791 abstract "In this work we consider the linear electronic transport in bounded semiconductors in the presence of an external magnetic field. It is shown that the distribution of carrier temperature in the sample plays an important role, both qualitatively and quantitatively, in the study of magnetoresistance in semiconductors. Taking into account appropriate boundary conditions for the current density at the contacts and for the electron distribution temperature at the surface of the sample, a change in the magnetoresistance of bulk semiconductors is found as compared with the usual theory of galvanomagnetic effects in boundless media. The magnetoresistance is not zero, even if the relaxation time is assumed to be energy independent in isotropic media. In the standard theory there is no magnetoresistance when the relaxation time is energy independent. This remarkable result comes from the dependence of the applied electric field on the magnetic field, which is finite when the dimensions of the sample are very large, and it compensates the geometrical contribution of the magnetoresistance. This unusual behavior alters significantly the usual theory of galvanomagnetic effects developed for boundless media and conducting channels. @S0163-1829~97!05131-X#" @default.
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- W2038472791 date "1997-08-15" @default.
- W2038472791 modified "2023-09-25" @default.
- W2038472791 title "Role of the electron temperature distribution on magnetoresistance in bulk semiconductors" @default.
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- W2038472791 doi "https://doi.org/10.1103/physrevb.56.3863" @default.
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