Orbital order and spin-orbit coupling in BaVS3
arXiv:cond-mat/0506409 · doi:10.1016/j.physb.2006.01.187
Abstract
The correlated 3d sulphide BaVS3 undergoes a sequence of three symmetry breaking transitions which are reflected in the temperature dependence of the magnetic susceptibility, and its anisotropy. We introduce a microscopic model based on the coexistence of wide band a(1g) and localized e(g) d-electrons, and give the classification of the order parameters under the double space group and time reversal symmetries. Allowing for the relativistic spin-orbit coupling, the d-shell multipoles acquire a mixed spin-orbital character. It follows that orbital ordering is accompanied by a change in the susceptibility anisotropy
2 pages, submitted to the SCES05 conference, uses elsart41.cls