Second-order corrections in the scattering length shift the zero-sound velocity by factors exp(6) (density) and exp(-2) (polarization) relative to RPA predictions in a weakly interacting Fermi gas.
Shear viscosity in interacting two-dimensional Fermi liquids
2 Pith papers cite this work. Polarity classification is still indexing.
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abstract
In interaction-dominated two-dimensional electron gases at intermediate temperatures, electron transport is not diffusive as in the conventional Drude picture but instead hydrodynamic. The relevant transport coefficient in this regime is the shear viscosity. Here, we develop a numerically exact basis expansion to solve the Fermi liquid equation, and apply it to compute the shear viscosity of the electron gas with screened Coulomb interactions. Our calculations are valid at all temperatures and in particular describe the response beyond the asymptotic low-temperature limit, where perturbative approaches exist. We show that even in this low-temperature limit, there is a nonanalytic exchange contribution to the shear viscosity, highlighting the need for a full nonperturbative solution of the Fermi liquid equation. We hope that the techniques developed in this work will serve as a platform to determine the response of interacting Fermi liquids.
representative citing papers
Tomographic dynamics with only head-on collisions explains superballistic conduction at low temperatures in electron fluids by treating electrons as fermions rather than classical particles.
citing papers explorer
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A low-energy effective Hamiltonian for Landau quasiparticles: II Application to the contact Fermi gas
Second-order corrections in the scattering length shift the zero-sound velocity by factors exp(6) (density) and exp(-2) (polarization) relative to RPA predictions in a weakly interacting Fermi gas.
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Superballistic paradox in electron fluids: Evidence of tomographic transport
Tomographic dynamics with only head-on collisions explains superballistic conduction at low temperatures in electron fluids by treating electrons as fermions rather than classical particles.