Negative deviations from Matthiessen's rule for SrRuO3 and CaRuO3

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

Research output: Contribution to journalArticlepeer-review

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Abstract

We have measured the change in the resistivity of thin films of SrRuO3 and CaRuO3 upon introducing point defects by electron irradiation at low temperatures, and we find significant negative deviations from Matthiessen's rule. For a fixed irradiation dose, the induced change in resistivity decreases with increasing temperature. Moreover, for a fixed temperature, the increase in resistivity with irradiation is found to be 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.

Original languageEnglish
Pages (from-to)532-538
Number of pages7
JournalEurophysics Letters
Volume55
Issue number4
DOIs
StatePublished - 11 Aug 2001
Externally publishedYes

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