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Title: Magnetoresistance of Au films

Classical magnetoresistance (MR) in nonmagnetic metals are conventionally understood in terms of the Kohler rule, with violation usually viewed as anomalous electron transport, in particular, as evidence of non-Fermi liquid behavior. Measurement of the MR of Au films as a function of temperature and film thickness reveals a strong dependence on grain size distribution and clear violation of the Kohler rule. Using a model of random resistor network, we show that this result can be explained if the MR arises entirely from inhomogeneity due to grain boundary scattering and thermal activation of grain boundary atoms. Consequently, the Kohler rule should not be used to distinguish normal and anomalous electron transport in solids.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Institute of Physics, Chinese Academy of Sciences, Beijing 10081 (China)
  2. Department of Physics and Quantum Theory Project, University of Florida, Gainesville, Florida 32611 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22402767
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; DISTRIBUTION; ELECTRONS; FERMI GAS; FILMS; GRAIN BOUNDARIES; GRAIN SIZE; MAGNETORESISTANCE; METALS; RANDOMNESS; RESISTORS; SCATTERING; SOLIDS; TEMPERATURE DEPENDENCE; THICKNESS