Multipolar Fermi Surface Deformations in Sr_{2}RuO_{4} Probed by Resistivity and Sound Attenuation: A Window into Electron Viscosity and the Collision Operator.

Recent developments in electron hydrodynamics have demonstrated the importance of considering the full structure of the electron-electron scattering operator, which encodes a sequence of lifetimes, one for each component of the Fermi surface deformat…

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