Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model
Strongly Correlated Electrons
2008-10-27 v2
Abstract
A single-site dynamical mean field study of a three band model with the rotationally invariant interactions appropriate to the t_2g 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 \Sigma(\omega)\sim \sqrt{\omega} and a broad quantum critical regime. The findings are discussed in the context of the power law observed in the optical conductivity of SrRuO_3.
Keywords
Cite
@article{arxiv.0806.2621,
title = {Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model},
author = {Philipp Werner and Emanuel Gull and Matthias Troyer and Andrew J. Millis},
journal= {arXiv preprint arXiv:0806.2621},
year = {2008}
}