The effect of spin-orbit coupling on the effective-spin correlation in YbMgGaO4
Abstract
Motivated by the recent experiments on the triangular lattice spin liquid YbMgGaO, we explore the effect of spin-orbit coupling on the effective-spin correlation of the Yb local moments. We point out the anisotropic interaction between the effective-spins on the nearest neighbor bonds is sufficient to reproduce the spin-wave dispersion of the fully polarized state in the presence of strong magnetic field normal to the triangular plane. We further evaluate the effective-spin correlation within the mean-field spherical approximation. We explicitly demonstrate that, the nearest-neighbor anisotropic effective-spin interaction, originating from the strong spin-orbit coupling, enhances the effective-spin correlation at the M points in the Brillouin zone. We identify these results as the strong evidence for the anisotropic interaction and the strong spin-orbit coupling in YbMgGaO.
Keywords
Cite
@article{arxiv.1608.06445,
title = {The effect of spin-orbit coupling on the effective-spin correlation in YbMgGaO4},
author = {Yao-Dong Li and Yao Shen and Yuesheng Li and Jun Zhao and Gang Chen},
journal= {arXiv preprint arXiv:1608.06445},
year = {2018}
}
Comments
6+epsilon pages, 3 figures. This paper will not be published anywhere until the relevant experimental works that we used are accepted. Update acknowledgements