2007/05/31 by Tigran Sedrakyan, T. A. Sedrakyan, M. E. Raikh +1 · 1 citation
Engineering · Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor materials and devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.100.106806
published as Phys. Rev. Lett. 100, 106806 (2008) · 4+ pages, 3 figures
openalex publication_date 2008/03/14 · arxiv created 2008/03/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the magnetoresistance \ensuremathδ\ensuremathρxx(B)/\ensuremathρ0 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 \ensuremathδ\ensuremathρxx(B)/\ensuremathρ0 is governed by the interaction effects. Assuming short-range impurity scattering, we demonstrate that in the second order in the interaction parameter \ensuremathλ a linear B dependence, \ensuremathδ\ensuremathρxx(B)/\ensuremathρ0\ensuremath∼\ensuremathλ2\ensuremathωc/EF with a temperature-independent slope, emerges in this domain of B (here \ensuremathωc and EF are the cyclotron frequency and the Fermi energy, respectively). Unlike previous mechanisms, the linear magnetoresistance is unrelated to the electron executing the full Larmour circle, but rather originates from the impurity scattering via the B dependence of the phase of the impurity-induced Friedel oscillations.