Determination of the orbital moment and crystal field splitting in LaTiO₃
Haverkort, M. W. · Hu, Z. · Tanaka, A. · Ghiringhelli, G. · Roth, H. · Cwik, M. · Lorenz, T. · Schuessler-Langeheine, C. · Streltsov, S. V. · Mylnikova, A. S. · Anisimov, V. I. · de Nadai, C. · Brookes, N. B. · Hsieh, H. H. · Lin, H. -J. · Chen, C. T. · Mizokawa, T. · Taguchi, Y. · Tokura, Y. · Khomskii, D. I. · Tjeng, L. H.
Original · EN
Utilizing a sum-rule in a spin-resolved photoelectron spectroscopic experiment with circularly polarized light, we show that the orbital moment in LaTiO₃ is strongly reduced both below and above the Néel temperature. Using Ti L₂,₃ x-ray absorption spectroscopy as a local probe, we found that the crystal field splitting in the t₂g subshell is about 0.12-0.30 eV. This large splitting does not facilitate the formation of an orbital liquid.
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