Spin-orbit coupling in the Mott insulator Ca2RuO4
- Mizokawa, T.
- Tjeng, L.H
- Sawatzky, G.A
- Ghiringhelli, G.
- Tjernberg, O.
- Brookes, N.B.
- Fukazawa, H.
- Nakatsuji, S.
- Maeno, Y.
Publication date
January 2001
DOIAbstract
O 1s x-ray absorption study of the Mott insulator Ca2RuO4 shows that the orbital population of the 4d t2g band dramatically changes with temperature. In addition, spin-resolved circularly polarized photoemission study of Ca2RuO4 shows that a substantial orbital angular momentum is induced in the Ru 4d t2g band. Based on the experimental results and model Hartree-Fock calculations, we argue that the cooperation between the strong spin-orbit coupling in the Ru 4d t2g band and the small distortion of the RuO6 octahedra causes the interesting changeover of the spin and orbital anisotropy as a function of temperature
Add to ORKG