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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/5299

Title: Momentum dependence of orbital excitations in Mott-Insulating Titanates
Authors: Ulrich, C
Ament, LJP
Ghiringhelli, G
Braicovich, L
Moretti Sala, M
Pezzotta, N
Schmitt, T
Khaliullin, G
van den Brink, J
Roth, H
Lorenz, T
Keimer, B
Keywords: X-ray lasers
Orbits
Titantes
Titanium oxides
Electrons
Valence
Issue Date: 4-Sep-2009
Publisher: American Physical Society
Citation: Ulrich, C., Ament, L. J. P., Ghiringhelli, G., Braicovich, L., Moretti Sala, M., Pezzotta, N., Schmitt, T., Khaliullin, G., van den Brink, J., Roth, H., Lorenz, T., & Keimer, B. (2012). Momentum dependence of orbital excitations in Mott-Insulating Titanates. Physical Review Letters, 103(10), Article Number 107205. doi:10.1103/PhysRevLett.103.107205
Abstract: High-resolution resonant inelastic x-ray scattering has been used to determine the momentum dependence of orbital excitations in Mott-insulating LaTiO(3) and YTiO(3) over a wide range of the Brillouin zone. The data are compared to calculations in the framework of lattice-driven and superexchange-driven orbital ordering models. A superexchange model in which the experimentally observed modes are attributed to two-orbiton excitations yields the best description of the data. 2008, American Physical Society.
URI: http://dx.doi.org/10.1103/PhysRevLett.103.107205
http://apo.ansto.gov.au/dspace/handle/10238/5299
ISSN: 0031-9007
Appears in Collections:Journal Articles

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