| Autor: |
Lefrançois, E., Pradipto, A. -M., Sala, M. Moretti, Chapon, L. C., Simonet, V., Picozzi, S., Lejay, P., Petit, S., Ballou, R. |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 93, 224401 (2016) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.93.224401 |
| Popis: |
We report our investigation of the electronic and magnetic excitations of Sr$_3$NiIrO$_6$ by resonant inelastic x-ray scattering at the Ir L$_3$ edge. The intra-$t_{2g}$ electronic transitions are analyzed using an atomic model, including spin-orbit coupling and trigonal distortion of the IrO$_6$ octahedron, confronted to {\it ab initio} quantum chemistry calculations. The Ir spin-orbital entanglement is quantified and its implication on the magnetic properties, in particular in inducing highly anisotropic magnetic interactions, is highlighted. These are included in the spin-wave model proposed to account for the dispersionless magnetic excitation that we observe at 90 meV. By counterbalancing the strong Ni$^{2+}$ easy-plane anisotropy that manifests itself at high temperature, the anisotropy of the interactions finally leads to the remarkable easy-axis magnetism reported in this material at low temperature. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
