Orbital ordering promotes weakly-interacting S=1/2 dimers in the triangular lattice compound Sr3Cr2O8
| dc.creator | Chapon, L. C. | |
| dc.creator | Stock, C. | |
| dc.creator | Radaelli, P. G. | |
| dc.creator | Martin, C. | |
| dc.date | 2008-07-05 | |
| dc.date | 2008-07-10 | |
| dc.date.accessioned | 2026-07-07T09:49:18Z | |
| dc.date.available | 2026-07-07T09:49:18Z | |
| dc.description | The weakly interacting S=1/2 dimers system Sr3Cr2O8 has been investigated by powder neutron diffraction and inelastic neutron scattering. Our data reveal a structural phase transition below room temperature corresponding to an antiferro-orbital ordering with nearly 90 degrees arrangement of the occupied 3z^2-r^2 d-orbital. This configuration leads to a drastic reduction of the inter-dimer exchange energies with respect to the high temperature orbital-disorder state, as shown by a spin-dimer analysis of the super-superexchange interactions performed using the Extended Huckel Tight Binding method. Inelastic neutron scattering reveals the presence of a quasi non-dispersive magnetic excitation at 5.4 meV, in agreement with the picture of weakly-interacting dimers. | |
| dc.identifier | https://arxiv.org/abs/0807.0877 | |
| dc.identifier | http://arxiv.org/abs/0807.0877 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/164538 | |
| dc.subject | Materials Science | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Orbital ordering promotes weakly-interacting S=1/2 dimers in the triangular lattice compound Sr3Cr2O8 | |
| dc.type | text |