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Many correlated electron systems with diverse magnetic and electronic ground states turn into bad metals at high temperature – that is their resistivity increases with temperature and shows no sign of saturation well beyond the Mott-Ioffe-Regel (MIR) limit.  In this regime there are no quasiparticle-like excitations because with a coherence length below the Fermi wavelength, a particle like description is no longer appropriate.
I will discuss how quasiparticles evolves during this crossover in the model Fermi liquid Sr2RuO4. In contrast to common ARPES beliefs, I will show that these fast and furious quasiparticles eventually die not by losing spectral weight but by dissolving in the incoherent part of the spectrum via excessive broadening.  

Please register on this doodle if you want to join for pizza!

The slides of this presentation can be downloaded here (PDF, 8MB)

Location: Stuckelberg, Ecole de Physique
Time: Friday 20 October 2023, 12:10 for pizza, 12:30 start discussion