Orbital Ordered States In Rvo3(R=Y, Tb) Studied By A Resonant X-Ray Scattering

The orbital ordered states of V 3d in RVO3 (R=Y, Tb) have been investigated by a resonant x-ray scattering (RXS) technique. The RXS signals at (0 1 1) were measured near the V K-edge energy in the G-type orbital ordered (G-OO) phase. We found two kinds of the RXS signals, which reflect the orbital state and the local crystal symmetry. The former signal disappears in the orbital disordered phase, while the latter still survives. Moreover, the signals have different azimuthal angle dependence. Using the dependence of the RXS signal reflecting the orbital state, we evaluated the orbital ordered structure in the G-OO phase. Consequently, we succeeded in determining the G-type orbital arrangement of V orbitals by the RXS technique.