Spin wave dispersion based on the quasiparticle self-consistent $GW$ method: NiO, MnO and $α$-MnAs

Details Spin wave dispersion based on the quasiparticle self-consistent $GW$ method: NiO, MnO and $α$-MnAs Spin wave dispersion based on the quasiparticle self-consistent $GW$ method: NiO, MnO and $α$-MnAs

2007-07-26

arxiv.org/abs/0707.3850v2

J. Phys.: Condens. Matter 20 (2008) 295214

Physics

Condensed Matter

Materials Science

V2: add another figure for SW life time. Formalism is detailed

Scientific paper

10.1088/0953-8984/20/29/295214

We present spin wave dispersions in MnO, NiO, and $\alpha$-MnAs based on the quasiparticle self-consistent $GW$ method (\qsgw), which determines an optimum quasiparticle picture. For MnO and NiO, \qsgw results are in rather good agreement with experiments, in contrast to the LDA and LDA+U description. For $\alpha$-MnAs, we find a collinear ferromagnetic ground state in \qsgw, while this phase is unstable in the LDA.

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