English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a theory of the collective orbital excitation termed orbital wavein perovskite titanates and vanadates with the triply degenerate $t_{2g}$orbitals. The dispersion relations of the orbital waves for the orbital orderedLaVO$_3$, YVO$_3$ and YTiO$_3$ are examined in the effective spin-orbitalcoupled Hamiltonians associated with the Jahn-Teller type couplings. We proposepossible scattering processes for the Raman and inelastic neutron scatteringsfrom the orbital wave and calculate the scattering spectra for titanates andvanadates. It is found that both the excitation spectra and the observationmethods of the orbital wave are distinct qualitatively from those for the $e_g$orbital ordered systems.Comment: 9 pages, 7 figure

Orbital wave and its observation in orbital-ordered titanates and vanadates