Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Correlated Electrons: Materials
TT 12.9: Vortrag
Dienstag, 6. September 2022, 11:45–12:00, H22
Anisotropic quasiparticle life times and magnetotransport in the doped Hubbard model — •Niklas Witt1, Erik van Loon2, Sergey Brener1, Mikhail Katsnelson3, Alexander Lichtenstein1, and Tim Wehling1 — 1University of Hamburg, Hamburg, Germany — 2Lund University, Lund, Sweden — 3Radboud University, Nijmegen, The Netherlands
The strange metal phase of high-temperature superconducting copper oxide (cuprate) materials exhibits several unconventional transport properties like T-linear resistivity that do not conform to a conventional Fermi liquid description. The crossover to a normal metal for large dopings and the origin of the anomalous electronic properties remain unsolved problems.
Recent transport measurements [1,2] suggest that two different charge sectors exist, one with coherent quasiparticle charge carriers and the other with incoherent non-quasiparticle excitations. Only the former contributes to transport, leading to a drop of the Hall carrier density for small doping. To examine this hypothesis, we study the hole-doped Hubbard model using complementary many-body methods from the weak- and strong-coupling limit. We demonstrate that a dichotomy of the scattering rates between charge carriers from different momentum regions emerges which can lead to the reduction of the Hall carrier density already in the framework of semiclassical Boltzmann theory.
[1] M. Culo et al., SciPost Physics 11 (2021)
[2] J. Ayres et al., Nature 595, 661 (2021)