Crystal and magnetic structure of LaTiO3 : evidence for non-degenerate $t_{2g}$-orbitals

Details Crystal and magnetic structure of LaTiO3 : evidence for non-degenerate $t_{2g}$-orbitals Crystal and magnetic structure of LaTiO3 : evidence for non-degenerate $t_{2g}$-orbitals

2003-02-04

arxiv.org/abs/cond-mat/0302087v2

published in Physical Review B Rapid Communication 68, 060401 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages 5 figures

Scientific paper

10.1103/PhysRevB.68.060401

The crystal and magnetic structure of LaTiO3 ~ has been studied by x-ray and neutron diffraction techniques using nearly stoichiometric samples. We find a strong structural anomaly near the antiferromagnetic ordering, T$_N$=146 K. In addition, the octahedra in LaTiO3 exhibit an intrinsic distortion which implies a splitting of the t2g-levels. Our results indicate that LaTiO3 should be considered as a Jahn-Teller system where the structural distortion and the resulting level splitting are enhanced by the magnetic ordering.

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