Equivalence of single-particle and transport lifetimes from hybridization fluctuations

Abstract

Single band theories of quantum criticality successfully describe a single-particle lifetime with non-Fermi liquid temperature dependence. But, they fail to obtain a charge transport rate with the same dependence unless the interaction is assumed to be momentum independent. Here we demonstrate that a quantum critical material, with a long range mode that transmutes electrons between light and heavy bands, exhibits a quasi-linear temperature dependence for {\it both} the single-particle and the charge transport lifetimes, despite the strong momentum dependence of the interaction.

4+ pages, 2 figures

References in corpus (8)

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• Fractionalized Fermi liquids
• Kondo Breakdown as a Selective Mott Transition in the Anderson Lattice
• Nonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5
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• Quantum Criticality in the Ferromagnetic Superconductor UCoGe under Pressure and Magnetic Field
• Small to large Fermi surface transition in a single band model, using randomly coupled ancillas
• Solvable Theory of a Strange Metal at the Breakdown of a Heavy Fermi Liquid
• Strange metal from incoherent bosons
• Fractionalized Fermi liquids and the cuprate phase diagram