Low-energy V t2g orbital excitations in NdVO3

Abstract

The electronic structure of NdVO3, YVO3 has been investigated as a function of sample temperature using resonant inelastic soft x-ray scattering at the V L3-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 t2g states. Moreover, this feature exhibits a strong sample temperature dependence, reaching maximum intensity in the orbitally-ordered phase of NdVO3, 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.

References in corpus (7)

• Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
• Orbital fluctuations in the different phases of LaVO3 and YVO3
• Structural, electronic, and magneto-optical properties of YVO${}_3$
• Hubbard exciton revealed by time-domain optical spectroscopy
• One-dimensional orbital fluctuations and the exotic magnetic properties of YVO${}_3$
• Spin, orbital ordering and magnetic dynamics of LaVO3: magnetization, heat capacity and neutron scattering studies
• First-Principles Computation of YVO3; Combining Path-Integral Renormalization Group with Density-Functional Approach