Crossover from weak localization to Shubnikov-de Haas oscillations in a high mobility 2D electron gas

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dc.creatorSedrakyan, T. A.
dc.creatorRaikh, M. E.
dc.date2007-05-31
dc.date2008-03-17
dc.date.accessioned2026-07-07T09:26:44Z
dc.date.available2026-07-07T09:26:44Z
dc.descriptionWe study the magnetoresistance, δρ_{xx}(B)/ρ_0, of a high-mobility 2D electron gas in the domain of magnetic fields, B, intermediate between the weak localization and the Shubnikov-de Haas oscillations, where δρ_{xx}(B)/ρ_0 is governed by the interaction effects. Assuming short-range impurity scattering, we demonstrate that in the {\em second order} in the interaction parameter, $λ$, a {\em linear} B-dependence, δρ_{xx}(B)/ρ_0\sim λ^2ω_c/E_F with {\em temperature-independent} slope emerges in this domain of B (here ω_c and E_F are the cyclotron frequency and the Fermi energy, respectively). Unlike previous mechanisms, the linear magnetoresistance is {\em unrelated} to the electron executing the full Larmour circle, but rather originates from the impurity scattering via the B-dependence of the {\em phase} of the impurity-induced Friedel oscillations.
dc.description4+ pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0705.4486
dc.identifierhttp://arxiv.org/abs/0705.4486
dc.identifierPhys. Rev. Lett. 100, 106806 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.106806
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156858
dc.subjectMesoscale and Nanoscale Physics
dc.titleCrossover from weak localization to Shubnikov-de Haas oscillations in a high mobility 2D electron gas
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