Spin-Orbit Coupling in the Mott Insulator Ca{sub 2}RuO{sub 4}
Journal Article
·
· Physical Review Letters
O 1s x-ray absorption study of the Mott insulator Ca{sub 2}RuO {sub 4} shows that the orbital population of the 4d t{sub 2g} band dramatically changes with temperature. In addition, spin-resolved circularly polarized photoemission study of Ca{sub 2}RuO {sub 4} shows that a substantial orbital angular momentum is induced in the Ru 4d t{sub 2g} 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 t{sub 2g} band and the small distortion of the RuO{sub 6} octahedra causes the interesting changeover of the spin and orbital anisotropy as a function of temperature.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40230968
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 87; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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