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  • Title: Low-energy V t2g orbital excitations in NdVO3.
    Author: Laverock J, Chen B, Preston AR, Newby D, Piper LF, Tung LD, Balakrishnan G, Glans PA, Guo JH, Smith KE.
    Journal: J Phys Condens Matter; 2014 Nov 12; 26(45):455603. PubMed ID: 25336521.
    Abstract:
    The electronic structure of NdVO(3) and YVO(3) has been investigated as a function of sample temperature using resonant inelastic soft x-ray scattering at the V L(3)-edge. Most of the observed spectral features are in good agreement with an atomic crystal-field multiplet model. However, a low energy feature is observed at ∼ 0.4 eV that cannot be explained by crystal-field arguments. The resonant behaviour of this feature establishes it as due to excitations of the V t(2g) states. Moreover, this feature exhibits a strong sample temperature dependence, reaching maximum intensity in the orbitally-ordered phase of NdVO(3), before becoming suppressed at low temperatures. This behaviour indicates that the origin of this feature is a collective orbital excitation, i.e. the bi-orbiton.
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