Determination of the orbital moment and crystal-field splitting in LaTiO3.

Authors :: Haverkort MW
Hu Z
Tanaka A
Ghiringhelli G
Roth H
Cwik M
Lorenz T
Schüssler-Langeheine C
Streltsov SV
Mylnikova AS
Anisimov VI
de Nadai C
Brookes NB
Hsieh HH
Lin HJ
Chen CT
Mizokawa T
Taguchi Y
Tokura Y
Khomskii DI
Tjeng LH
Source :: Physical review letters [Phys Rev Lett] 2005 Feb 11; Vol. 94 (5), pp. 056401. Date of Electronic Publication: 2005 Feb 07.
Publication Year :: 2005
Abstract: 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 from its ionic value, both below and above the Ne el 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.