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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2004

Large positive magneto-resistance in high mobility 2D electron gas : interplay of short and long range disorder

Résumé

We have observed a large positive quasi-classicalmagneto-resistance (MR) in a high mobility 2D electron gas inAlGaAs/GaAs heterostructure. The magneto-resistance isnon-saturating and increases with magnetic field as $\rho_{xx}\simB^{\alpha} (\alpha=0.9-1.2)$. In antidot lattices a non-monotonicMR is observed. We show that in both cases this MR can bequalitatively described in terms of the theory recently advancedby Polyakov et al (PRB, 64, 205306 (2001)).Their prediction is that such behavior as we observe may be theconsequence of a concurrent existence of short and long rangescattering potentials.
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Dates et versions

hal-00001007 , version 1 (07-01-2004)
hal-00001007 , version 2 (09-03-2004)

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Vincent T. F. Renard, Ze Don Kvon, G. M. Gusev, J.C Portal. Large positive magneto-resistance in high mobility 2D electron gas : interplay of short and long range disorder. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2004, 70, pp.033303. ⟨hal-00001007v2⟩
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