Scalable T2 resistivity in a small single-component Fermi surface

• Autores: Xiao-Song Lin, Benoît Fauqué, Kamran Behnia
• Localización: Science, ISSN 0036-8075, Vol. 349, Nº 6251, 2015, págs. 945-948
• Idioma: inglés
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• Resumen

  • Scattering among electrons generates a distinct contribution to electrical resistivity that follows a quadratic temperature (T) dependence. In strongly correlated electron systems, the prefactor A of this T2 resistivity scales with the magnitude of the electronic specific heat, γ. Here we show that one can change the magnitude of A by four orders of magnitude in metallic strontium titanate (SrTiO3) by tuning the concentration of the carriers and, consequently, the Fermi energy. The T2 behavior persists in the single-band dilute limit despite the absence of two known mechanisms for T2 behavior: distinct electron reservoirs and Umklapp processes. The results highlight the absence of a microscopic theory for momentum decay through electron-electron scattering in various Fermi liquids.