Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model

2008/06/30 by Philipp Werner, Emanuel Gull, Matthias Troyer +1
Physics and Astronomy · #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.101.166405

published as Phys. Rev. Lett. 101, 166405 (2008)

arxiv created 2008/10/27 · arxiv updated 2009/12/01

Abstract

A single-site dynamical mean field study of a three band model with the rotationally invariant interactions appropriate to the t₂g levels of a transition metal oxide reveals a quantum phase transition between a paramagnetic metallic phase and an incoherent metallic phase with frozen moments. The Mott transitions occurring at electron densities n=2,3 per site take place inside the frozen moment phase. The critical line separating the two phases is characterized by a self energy with the frequency dependence Σ(ω)∼ √ω and a broad quantum critical regime. The findings are discussed in the context of the power law observed in the optical conductivity of SrRuO₃.

Cited by

• Signatures of Hund's metal physics in single-layered 3d transition metal oxide, Sr₂CoO₄