Magnetic interactions and orbital physics in RVO$_{3}$ perovskites

We have performed inelastic neutron scattering study on high quality YVO3 and LaVO3 powders. The magnetic interactions determined from the scattering spectra for YVO3 agree with a previous single crystal study. [1] For LaVO3, a --Jab $>$ Jc is in sharp contrast to the Jc $>$ -Jab in the C-type magnetically (C-AF) ordered state of YVO3. The mechanism that greatly suppresses Jab in C-AF state of YVO3 will be discussed together with thermal conductivity [2] and Raman spectroscopy [3] results. \newline [1] C. Ulrich, et al., Phys. Rev. Lett. \textbf{91}, 257202 (2003). \newline [2] J.-Q. Yan, et al., Phys. Rev. Lett. \textbf{93}, 235901 (2004). \newline [3] S. Miyasaka, et al., Phys. Rev. B \textbf{73}, 224436 (2006).