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Linear magnetoresistance in metals: Guiding center diffusion in a smooth random potential

Song, Justin C. W. and Refael, Gil and Lee, Patrick A. (2015) Linear magnetoresistance in metals: Guiding center diffusion in a smooth random potential. Physical Review B, 92 (18). Art. No. 180204. ISSN 1098-0121. doi:10.1103/PhysRevB.92.180204.

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We predict that guiding center (GC) diffusion yields a linear and nonsaturating (transverse) magnetoresistance in 3D metals. Our theory is semiclassical and applies in the regime where the transport time is much greater than the cyclotron period and for weak disorder potentials which are slowly varying on a length scale much greater than the cyclotron radius. Under these conditions, orbits with small momenta along magnetic field B are squeezed and dominate the transverse conductivity. When disorder potentials are stronger than the Debye frequency, linear magnetoresistance is predicted to survive up to room temperature and beyond. We argue that magnetoresistance from GC diffusion explains the recently observed giant linear magnetoresistance in 3D Dirac materials.

Item Type:Article
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URLURL TypeDescription Paper
Song, Justin C. W.0000-0002-5175-6970
Alternate Title:Guiding center linear magnetoresistance in the semi-classical regime
Additional Information:© 2015 American Physical Society. Received 30 July 2015; published 16 November 2015. We thank Adam Nahum and Brian Skinner for helpful discussions. J.C.W.S. acknowledges support from a Burke fellowship at Caltech. G.R. acknowledges support from the Packard Foundation and the Institute for Quantum Information and Matter (IQIM) an NSF funded physics frontier center, supported in part by the Moore Foundation. P.A.L. acknowledges the support of the DOE under Grant No. DE-FG01-03-ER46076 and the hospitality of the IQIM while this work was initiated.
Group:Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Department of Energy (DOE)DE-FG01-03-ER46076
Issue or Number:18
Classification Code:PACS number(s): 75.47.−m, 72.15.Gd
Record Number:CaltechAUTHORS:20151019-160221583
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61294
Deposited By: Tony Diaz
Deposited On:19 Oct 2015 23:22
Last Modified:10 Nov 2021 22:46

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