Orbital Properties of Sr3Ru2O7 and Related Ruthenates Probed by 17O-NMR
| dc.creator | Kitagawa, K. | |
| dc.creator | Ishida, K. | |
| dc.creator | Perry, R. S. | |
| dc.creator | Murakawa, H. | |
| dc.creator | Yoshimura, K. | |
| dc.creator | Maeno, Y. | |
| dc.date | 2006-09-06 | |
| dc.date | 2006-12-03 | |
| dc.date.accessioned | 2026-07-07T07:41:37Z | |
| dc.date.available | 2026-07-07T07:41:37Z | |
| dc.description | We report a site-separated $^{17}$O-NMR study of the layered perovskite ruthenate Sr$_3$Ru$_2$O$_7$, which exhibits nearly two-dimensional transport properties and itinerant metamagnetism at low temperatures. The local hole occupancies and the spin densities in the oxygen $2p$ orbitals are obtained by means of tight-binding analyses of electric field gradients and anisotropic Knight shifts. These quantities are compared with two other layered perovskite ruthenates: the two-dimensional paramagnet Sr$_2$RuO$_4$ and the three-dimensional ferromagnet SrRuO$_3$. The hole occupancies at the oxygen sites are very large, about one hole per ruthenium atom. This is due to the strong covalent character of the Ru-O bonding in this compound. The magnitude of the hole occupancy might be related to the rotation or tilt of the RuO$_6$ octahedra. The spin densities at the oxygen sites are also large, 20-40% of the bulk susceptibilities, but in contrast to the hole occupancies, the spin densities strongly depend on the dimensionality. This result suggests that the density-of-states at the oxygen sites plays an essential role for the understanding of the complex magnetism found in the layered perovskite ruthenates. | |
| dc.description | 9 pages, 5 figures, to be published in Phys. Rev. B | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0609143 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0609143 | |
| dc.identifier | Phys. Rev. B 75, 024421 (2007) | |
| dc.identifier | doi:10.1103/PhysRevB.75.024421 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/122178 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Orbital Properties of Sr3Ru2O7 and Related Ruthenates Probed by 17O-NMR | |
| dc.type | text |