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Electron transport properties of deformed potassium and a potassium-rubidium alloy from 0.08 to 4.2 K

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Abstract

Measurements have been performed of electrical resistivity ρ and thermoelectric ratioG on deformed samples of potassium as well as of ρ on a deformed 0.077 at %KRb alloy. A large anomaly in ρ(T) forT<0.5 K is ascribed to electrons interacting with vibrating dislocations and it is shown that the data are consistent with a model of Gantmakher and Kulesko in which the scattering arises from local phonon modes associated with the dislocations. ForT>1 K, an increase in ρ(T) is ascribed to the suppression of phonon drag by the dislocations. The latter is qualitatively confirmed by theG measurements. A maximum inG at ∼0.5 K is observed when dislocations are present. The two effects in ρ(T) outlined above are so large that the change in the electron-electron scattering contribution to ρ due to deformation cannot be precisely determined.

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Authors and Affiliations

  1. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan

    M. L. Haerle, W. P. Pratt Jr. & P. A. Schroeder

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  1. M. L. Haerle
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  2. W. P. Pratt Jr.
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  3. P. A. Schroeder
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Haerle, M.L., Pratt, W.P. & Schroeder, P.A. Electron transport properties of deformed potassium and a potassium-rubidium alloy from 0.08 to 4.2 K. J Low Temp Phys 62, 397–431 (1986). https://doi.org/10.1007/BF00683404

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