Hall angle of a spatially random vector model

초록

Strange metals exhibit linear resistivity and anomalous Hall transport, yet a comprehensive theory that accounts for both phenomena is still lacking. Recent studies have shown Sachdev-Ye-Kitaev-like spatially random couplings between a Fermi surface and a bosonic field, either scalar or vector type, can yield linear-T resistivity. In this paper, we continue the investigation of vector coupling in the presence of a magnetic field. We compute the fermion and boson propagators, along with the self-energy and polarization functions, and determine their dependence on the magnetic field. Although the Hall angle does not exhibit the signature of a strange metal, the linear-in-temperature resistivity remains at low temperatures. Results indicate that random interactions can robustly support linear transport, although additional ingredients may be required to capture the full phenomenology of strange metals.

키워드