Deviations from Matthiessen's Rule for ${\rm SrRuO_3}$ and ${\rm CaRuO_3}$

L. Klein; Y. Kats; N. Wiser; M. Konczykowski; J. W. Reiner; T. H. Geballe; M. R. Beasley; A. Kapitulnik

doi:10.1209/epl/i2001-00448-8

Deviations from Matthiessen's Rule for ${\rm SrRuO_3}$ and ${\rm CaRuO_3}$

Strongly Correlated Electrons 2011-06-15 v1

Authors: L. Klein , Y. Kats , N. Wiser , M. Konczykowski , J. W. Reiner , T. H. Geballe , M. R. Beasley , A. Kapitulnik

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Abstract

We have measured the change in the resistivity of thin films of ${\rm SrRuO_3}$ and ${\rm CaRuO_3}$ upon introducing point defects by electron irradiation at low temperatures, and we find significant deviations from Matthiessen's rule. For a fixed irradiation dose, the induced change in resistivity {\it decreases} with increasing temperature. Moreover, for a fixed temperature, the increase in resistivity with irradiation is found to be {\it sublinear}. We suggest that the observed behavior is due to the marked anisotropic scattering of the electrons together with their relatively short mean free path (both characteristic of many metallic oxides including cuprates) which amplify effects related to the Pippard ineffectiveness condition.

Keywords

Matthiessen's rule resistivity point defects electron irradiation anisotropic scattering

Cite

@article{arxiv.cond-mat/0011376,
  title  = {Deviations from Matthiessen's Rule for ${\rm SrRuO_3}$ and ${\rm CaRuO_3}$},
  author = {L. Klein and Y. Kats and N. Wiser and M. Konczykowski and J. W. Reiner and T. H. Geballe and M. R. Beasley and A. Kapitulnik},
  journal= {arXiv preprint arXiv:cond-mat/0011376},
  year   = {2011}
}

Deviations from Matthiessen's Rule for ${\rm SrRuO_3}$ and ${\rm CaRuO_3}$

Abstract

Keywords

Cite

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