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

Electron transport properties of deformed potassium and a potassium-rubidium alloy from 0.08 to... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

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

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References (37)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00683404
Publisher site
See Article on Publisher Site

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.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Nov 6, 2004

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