A dynamical mean-field theory study of Nagaoka ferromagnetism

Abstract

We revisit Nagaoka ferromagnetism in the U=oo Hubbard model within the dynamical mean-field theory (DMFT) using the recently developed continuous time quantum Monte Carlo method as the impurity solver. The stability of Nagaoka ferromagnetism is studied as a function of the temperature, the doping level, and the next-nearest-neighbor lattice hopping t'. We found that the nature of the phase transition as well as the stability of the ferromagnetic state is very sensitive to the t' hopping. Negative t'=-0.1t stabilizes ferromagnetism up to higher doping levels. The paramagnetic state is reached through a first order phase transition. Alternatively, a second order phase transition is observed at t'=0. Very near half-filling, the coherence temperature T_{coh} of the paramagnetic metal becomes very low and ferromagnetism evolves out of an incoherent metal rather than conventional Fermi liquid. We use the DMFT results to benchmark slave-boson method which might be useful in more complicated geometries.

arXiv comment10 pages, 11 figures

References in corpus (11)

• A continuous-time solver for quantum impurity models
• The cold atom Hubbard toolbox
• Quantum Monte Carlo Impurity Solver for Cluster DMFT and Electronic Structure Calculations in Adjustable Base
• Ferromagnetism in the two dimensional t-t' Hubbard model at the Van Hove density
• Ferromagnetism in the Hubbard Model on fcc-type lattices
• Microscopic conditions favoring itinerant ferromagnetism
• Magnetism and Phase Separation in the Ground State of the Hubbard Model
• Lattice dependence of saturated ferromagnetism in the Hubbard model
• Ferromagnetism in the large-U Hubbard model
• Nagaoka ferromagnetism in the two-dimensional infinite-U Hubbard model
• Temperature-dependent electronic structure and ferromagnetism in the d=oo Hubbard model studied by a modfied perturbation theory

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