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Title: Linear mean free path and quadratic temperature dependence of electron-phonon scattering rate in V{sub 82}Al{sub 18-x}Fe{sub x} alloys at low temperature

We have reported a comprehensive study on temperature and disorder dependence of inelastic electron dephasing scattering rate in disordered V{sub 82}Al{sub 18-x}Fe{sub x} alloys. The dephasing scattering time has been measured by analysis of low field magnetoresistance using the weak localization theory. In absence of magnetic field the variation of low temperature resistivity rise follows the relation Δρ(T)∝−ρ{sub 0}{sup 5/2}√(T), which is well described by three-dimensional electron-electron interactions. The temperature-independent dephasing rate strongly depends on disorder and follows the relation τ{sub 0}{sup −1}∝l{sub e}, where l{sub e} is the electron elastic mean free path. The inelastic electron-phonon scattering rate obeying the anomalous relation τ{sub e−ph}{sup −1}∝T{sup 2}l{sub e}. This anomalous behavior of τ{sub e−ph}{sup −1} cannot be explained in terms of current theories for electron-phonon scattering in impure dirty conductors.
Authors:
; ;  [1]
  1. Department of Physics, National Institute of Technology, Durgapur, Burdwan-713209, West Bengal (India)
Publication Date:
OSTI Identifier:
22488571
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 5; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; ELECTRON-ELECTRON COLLISIONS; ELECTRON-ELECTRON COUPLING; ELECTRON-ELECTRON INTERACTIONS; ELECTRONS; MAGNETIC FIELDS; MAGNETORESISTANCE; MEAN FREE PATH; PHONONS; SCATTERING; TEMPERATURE DEPENDENCE; VANADIUM COMPLEXES