Gutzwiller theory of band magnetism in LaOFeAs
Strongly Correlated Electrons
2014-10-07 v1
Abstract
We use the Gutzwiller variational theory to calculate the ground-state phase diagram and quasi-particle bands of LaOFeAs. The Fe3d--As4p Wannier-orbital basis obtained from density-functional theory defines the band part of our eight-band Hubbard model. The full atomic interaction between the electrons in the iron orbitals is parameterized by the Hubbard interaction U and an average Hund's-rule interaction J. We reproduce the experimentally observed small ordered magnetic moment over a large region of (U,J) parameter space. The magnetically ordered phase is a stripe spin-density wave of quasi-particles.
Keywords
Cite
@article{arxiv.1109.0929,
title = {Gutzwiller theory of band magnetism in LaOFeAs},
author = {Tobias Schickling and Florian Gebhard and Jörg Bünemann and Lilia Boeri and Ole K. Andersen and Werner Weber},
journal= {arXiv preprint arXiv:1109.0929},
year = {2014}
}
Comments
4 pages, 5 figures