Dynamical mean-field study of Vanadium diselenide monolayer ferromagnetism

A dynamical mean-field theory study of Nagaoka ferromagnetism

We revisit Nagaoka ferromagnetism in the two-dimensional U = ∞ Hubbard model using the dynamical mean-field theory (DMFT). A recently developed continuous time quantum Monte Carlo method is applied to solve the DMFT impurity problem. The stability of Nagaoka ferromagnetism is studied as a function of both the nearest-neighbor lattice hopping t and the next-nearest-neighbor lattice hopping t. It...

Dynamical mean-field theory study of Nagaoka ferromagnetism

We revisit Nagaoka ferromagnetism in the U= 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 transiti...

Magnetism in semiconductors: A dynamical mean-field study of ferromagnetism in Ga1−xMnxAs

K. Aryanpour,1,3 J. Moreno,2,3 M. Jarrell,3 and R. S. Fishman4 1Department of Physics, University of California, Davis, California 95616, USA 2Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA 3Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA 4Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tenne...

Itinerant ferromagnetism in the multiorbital Hubbard model: a dynamical mean-field study.

In order to resolve the long-standing issue of how itinerant ferromagnetism is affected by lattice structure and Hund's coupling, we compare various three-dimensional lattice structures in the single- and multiorbital Hubbard models with the dynamical mean-field theory with an improved quantum Monte Carlo algorithm that preserves the spin-SU(2) symmetry. The result indicates that both the latti...

Dynamical mean-field theory