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Journal Article

Fate of Quasiparticles at High Temperature in the Correlated Metal Sr2RuO4

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Sokolov,  D. A.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Mackenzie,  A. P.
Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Hunter, A., Beck, S., Cappelli, E., Margot, F., Straub, M., Alexanian, Y., et al. (2023). Fate of Quasiparticles at High Temperature in the Correlated Metal Sr2RuO4. Physical Review Letters, (23): 236502, pp. 1-7. doi:10.1103/PhysRevLett.131.236502.


Cite as: https://hdl.handle.net/21.11116/0000-000E-2614-1
Abstract
We study the temperature evolution of quasiparticles in the correlated metal Sr2RuO4. Our angle resolved photoemission data show that quasiparticles persist up to temperatures above 200 K, far beyond the Fermi liquid regime. Extracting the quasiparticle self-energy, we demonstrate that the quasiparticle residue Z increases with increasing temperature. Quasiparticles eventually disappear on approaching the bad metal state of Sr2RuO4 not by losing weight but via excessive broadening from super-Planckian scattering. We further show that the Fermi surface of Sr2RuO4