2009/09/30 by K. E. Nagaev, K. É. Nagaev, T. V. Kostyuchenko · 1 citation
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor materials and devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.81.125316
published as Phys. Rev. B 81, 125316 (2010) · 10 pages, 8 figures, published version
openalex publication_date 2010/03/12 · arxiv created 2010/03/27 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using a semiclassical Boltzmann equation, we calculate corrections to the Sharvin conductance of a wide two-dimensional electron gas ballistic contact that result from an electron-electron scattering in the leads. These corrections are dominated by collisions of electrons with nearly opposite momenta that come from different reservoirs. They are positive, increase with temperature, and are strongly suppressed by a magnetic field. We argue that this suppression may be responsible for an anomalous positive magnetoresistance observed in a recent experiment.