Article Dans Une Revue Phys.Rev.Lett. Année : 2025

Enhanced Strange Metallicity due to Hubbard-U Coulomb Repulsion

Résumé

We solve a model of electrons with Hubbard-U Coulomb repulsion and a random Yukawa coupling to a two-dimensional bosonic bath, using an extended dynamical mean field theory scheme. Our model exhibits a quantum critical point, at which the repulsive component of the electron interactions strongly enhances the effects of the quantum critical bosonic fluctuations on the electrons, leading to a breakdown of Fermi liquid physics and the formation of a strange metal with “Planckian” [O(kBT/)] quasiparticle decay rates at low temperatures T0. Furthermore, the eventual Mott transition that occurs as the repulsion is increased seemingly bounds the maximum decay rate in the strange metal. Our results provide insight into low-temperature strange metallicity observed in proximity to a Mott transition, as is observed, for instance, in recent experiments on certain moiré materials.

Dates et versions

hal-04918259 , version 1 (29-01-2025)

Identifiants

Citer

Andrew Hardy, Olivier Parcollet, Antoine Georges, Aavishkar A Patel. Enhanced Strange Metallicity due to Hubbard-U Coulomb Repulsion. Phys.Rev.Lett., 2025, 134 (3), pp.036502. ⟨10.1103/PhysRevLett.134.036502⟩. ⟨hal-04918259⟩
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