Resumo

JULLIEN, Remi; DMITRIEV, Alexander  e  DYAKONOV, Michel. Classical origin for a negative magnetoresistance and for its anomalous behavior at low magnetic fields in two dimensions. Rev. mex. fis. [online]. 2006, vol.52, suppl.3, pp.185-189. ISSN 0035-001X.

The classical two-dimensional problem of non-interacting electrons scattered by a static impurity potential in the presence of a magnetic field is investigated both analytically and numerically. A strong negative magnetoresistance is found, due to freely circling electrons, which are not taken into account by the Boltzmann-Drude approach. Moreover, at very low magnetic fields, the resistivity turns out to be proportional to , due to a memory effect specific for backscattering events.

Palavras-chave : Magnetotransport; magnetoresistance; semiconductors.

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