Anisotropic Hubbard model on a triangular lattice -- spin dynamics in Ho Mn O_3

Saptarshi Ghosh; Avinash Singh

doi:10.1007/s12043-008-0014-3

Anisotropic Hubbard model on a triangular lattice -- spin dynamics in Ho Mn O_3

Strongly Correlated Electrons 2015-06-25 v3

Authors: Saptarshi Ghosh , Avinash Singh

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

The recent neutron-scattering data for spin-wave dispersion in $\rm Ho Mn O_3$ are well described by an anisotropic Hubbard model on a triangular lattice with a planar (XY) spin anisotropy. Best fit indicates that magnetic excitations in $\rm Ho Mn O_3$ correspond to the strong-coupling limit $U/t > \sim 15$ , with planar exchange energy $J=4t^2/U \simeq 2.5$ meV and planar anisotropy $\Delta U \simeq 0.35$ meV.

Keywords

spin excitations in condensed matter hubbard model magnetic anisotropy

Cite

@article{arxiv.cond-mat/0506475,
  title  = {Anisotropic Hubbard model on a triangular lattice -- spin dynamics in Ho Mn O_3},
  author = {Saptarshi Ghosh and Avinash Singh},
  journal= {arXiv preprint arXiv:cond-mat/0506475},
  year   = {2015}
}

Comments

4 pages, 3 figures

Related papers

View all related →