Spontaneous Spatial Inversion Symmetry Breaking and Spin Hall Effect in a Spin-ice Double-exchange Model on a Pyrochlore Lattice
Strongly Correlated Electrons
2014-08-29 v1
Abstract
A formation of tetrahedral spin clusters is discovered by Monte Carlo simulation for a spin-ice type double-exchange model on a pyrochlore lattice. The spin-cluster phase is magnetically disordered, but breaks spatial inversion symmetry spontaneously by developing noncoplanar four-spin molecules periodically on the pyrochlore lattice. We find that the system exhibits a nonzero spin Hall conductivity in the spin-cluster phase. The result suggests that an intersite-multipole order induces the unconventional spin Hall state without the spin-orbit interaction.
Keywords
Cite
@article{arxiv.1308.5408,
title = {Spontaneous Spatial Inversion Symmetry Breaking and Spin Hall Effect in a Spin-ice Double-exchange Model on a Pyrochlore Lattice},
author = {Hiroaki Ishizuka and Yukitoshi Motome},
journal= {arXiv preprint arXiv:1308.5408},
year = {2014}
}
Comments
5 pages, 4 figures, accepted for publication in Rapid Communication section of Phys. Rev. B