Spin and orbital exchange interactions from Dynamical Mean Field Theory
Abstract
We derive a set of equations expressing the parameters of the magnetic interactions characterizing a strongly correlated electronic system in terms of single-electron Green's functions and self-energies. This allows to establish a mapping between the initial electronic system and a spin model including up to quadratic interactions between the effective spins, with a general interaction (exchange) tensor that accounts for anisotropic exchange, Dzyaloshinskii-Moriya interaction and other symmetric terms such as dipole-dipole interaction. We present the formulas in a format that can be used for computations via Dynamical Mean Field Theory algorithms.
Cite
@article{arxiv.1506.06209,
title = {Spin and orbital exchange interactions from Dynamical Mean Field Theory},
author = {Andrea Secchi and Alexander I. Lichtenstein and Mikhail I. Katsnelson},
journal= {arXiv preprint arXiv:1506.06209},
year = {2016}
}
Comments
Submitted to the Proceedings of the 20th International Conference on Magnetism, Barcelona (ICM2015)