Conditions for T2 resistivity from electron-electron scattering

Michael W. Swift () and Chris G. Van de Walle
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Michael W. Swift: University of California
Chris G. Van de Walle: Materials Department, University of California

The European Physical Journal B: Condensed Matter and Complex Systems, 2017, vol. 90, issue 8, 1-6

Abstract: Abstract Many complex oxides (including titanates, nickelates and cuprates) show a regime in which resistivity follows a power law in temperature (ρ ∝ T 2). By analogy to a similar phenomenon observed in some metals at low temperature, this has often been attributed to electron-electron (Baber) scattering. We show that Baber scattering results in a T 2 power law only under several crucial assumptions which may not hold for complex oxides. We illustrate this with sodium metal (ρ el−el ∝ T 2) and strontium titanate (ρ el−el $$\hbox{$\not\propto$}$$ T 2). We conclude that an observation of ρ ∝T 2 is not always sufficient evidence for electron-electron scattering.

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1140/epjb/e2017-80367-1

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