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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 ($\\rho_\\text{el-el}\\propto T^2$) and strontium titanate ($\\rho_\\text{el-el}\\not\\propto T^2$). 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Van de Walle, Michael Swift","submitted_at":"2017-01-17T16:11:37Z","abstract_excerpt":"Many complex oxides (including titanates, nickelates and cuprates) show a regime in which resistivity follows a power law in temperature ($\\rho\\propto T^2$). 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 ($\\rho_\\text{el-el}\\propto T^2$) and strontium titanate ($\\rho_\\text{el-el}\\not\\propto T^2$). 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