Origin of nonsaturating linear magnetoresistivity

Ferdinand Kisslinger, Christian Ott, and Heiko B. Weber
Phys. Rev. B 95, 024204 – Published 18 January 2017
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Abstract

The observation of nonsaturating classical linear magnetoresistivity has been an enigmatic phenomenon in solid-state physics. We present a study of a two-dimensional ohmic conductor, including local Hall effect and a self-consistent consideration of the environment. An equivalent-circuit scheme delivers a simple and convincing argument why the magnetoresistivity is linear in strong magnetic field, provided that current and biasing electric field are misaligned by a nonlocal mechanism. A finite-element model of a two-dimensional conductor is suited to display the situations that create such deviating currents. Besides edge effects next to electrodes, charge carrier density fluctuations are efficiently generating this effect. However, mobility fluctuations that have frequently been related to linear magnetoresistivity are barely relevant. Despite its rare observation, linear magnetoresitivity is rather the rule than the exception in a regime of low charge carrier densities, misaligned current pathways and strong magnetic field.

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  • Received 9 September 2016

DOI:https://doi.org/10.1103/PhysRevB.95.024204

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Ferdinand Kisslinger, Christian Ott, and Heiko B. Weber*

  • Lehrstuhl für Angewandte Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 7, 91058 Erlangen, Germany

  • *heiko.weber@fau.de

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Issue

Vol. 95, Iss. 2 — 1 January 2017

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