Linear magnetoresistance in metals: Guiding center diffusion in a smooth random potential
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PhysRevB.92.180204.pdf
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382.62 KB
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Author(s)
Song, Justin C. W.
Refael, Gil
Lee, Patrick A.
Date Issued
November 2015
Journal
Physical Review B
Publisher
American Physical Society
Citation
Song, Justin C. W., Gil Refael, and Patrick A. Lee. “Linear Magnetoresistance in Metals: Guiding Center Diffusion in a Smooth Random Potential.” Physical Review B 92, no. 18 (November 2015). © 2015 American Physical Society
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.92.180204
