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Revista mexicana de física

 ISSN 0035-001X

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

^len^aThe 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.^les^aEl problema bidimensional de electrones no interactuantes dispensados por un potencial estático en presencia de un campo magnético, se investigó tanto analítica como numéricamente. Se encuentra una fuerte magneto-resistencia negativa debida a los electrones libres circulantes, los cuales no se contemplan en la aproximación de Boltzman-Drude. Mas aún, a un campo magnético muy pequeño, la resistividad se sale de la proporcionalidad de , debido al efecto de memoria específico para los eventos de retrodispersión.

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