Model for a macroscopically disordered conductor with an exactly linear high-field magnetoresistance

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2005-05-17

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American Physical Society

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We calculate the effective resistivity of a macroscopically disordered two-dimensional conductor consisting of two components in a perpendicular magnetic field. When the two components have equal area fractions, we use a duality theorem to show that the magnetoresistance is nonsaturating and at high fields varies exactly linearly with the magnetic field. At other compositions, an effective-medium calculation leads to a saturating magnetoresistance. We briefly discuss possible connections between these results and magnetoresistance measurements on heavily disordered chalcogenide semiconductors.

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V. Guttal, D. Stroud, "Model for a macroscopically disordered conductor with an exactly linear high-field magnetoresistance," Physical Review B 71, no. 20 (2005), doi:10.1103/PhysRevB.71.201304

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http://hdl.handle.net/1811/48116

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Ohio State University Research and Scholarship