2008/05/26 by Matthias Ossadnik, M. Ossadnik, Carsten Honerkamp +4
Materials Science · Physics and Astronomy · #Condensed matter physics #Cuprate #Fermi liquid theory #Iron-based superconductors research #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Renormalization #Renormalization group #Scattering #Superconductivity #Superconductivity in MgB2 and Alloys #Vertex (graph theory) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.101.256405
4 pages, 5 figures, typos corrected
arxiv created 2008/05/26 · openalex publication_date 2008/12/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use the functional renormalization group to analyze the temperature dependence of the quasiparticle scattering rates in the two-dimensional Hubbard model below half-filling. Using a band structure appropriate to overdoped Tl2Ba2CuO6+x we find a strongly angle-dependent term linearly dependent on temperature which derives from an increasing scattering vertex as the energy scale is lowered. This behavior agrees with recent experiments and confirms earlier conclusions on the origin of the breakdown of the Landau-Fermi liquid near the onset of superconductivity.