A controlled expansion in s² for electrons with concentrated kinematics allows analytical calculations of spectral broadening, T-linear resistivity in bad metals, and spectral functions in Mott semimetals for Hubbard and Chern band models.
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In the topological heavy fermion model, the Mott semimetal phase hosts well-defined quasiparticles with dispersion and relaxation rate proportional to the interaction strength.
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Controlled expansion for correlated electrons with concentrated kinematics
A controlled expansion in s² for electrons with concentrated kinematics allows analytical calculations of spectral broadening, T-linear resistivity in bad metals, and spectral functions in Mott semimetals for Hubbard and Chern band models.
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Lifetime and spectral function of topological heavy fermions
In the topological heavy fermion model, the Mott semimetal phase hosts well-defined quasiparticles with dispersion and relaxation rate proportional to the interaction strength.