Charge and Spin Ordering in Insulating Na$_{0.5}$CoO$_2$: Effects of Correlation and Symmetry
| dc.creator | Lee, K. -W. | |
| dc.creator | Pickett, W. E. | |
| dc.date | 2005-10-20 | |
| dc.date | 2006-03-28 | |
| dc.date.accessioned | 2026-07-07T06:44:37Z | |
| dc.date.available | 2026-07-07T06:44:37Z | |
| dc.description | Ab initio band theory including correlations due to intra-atomic repulsion is applied to study charge disproportionation and charge- and spin-ordering in insulating Na$_{0.5}$CoO$_2$. Various ordering patterns (zigzag and two striped) for four-Co supercells are analyzed before focusing on the observed "out-of-phase stripe" pattern of antiferromagnetic Co$^{4+}$ spins along charge-ordered stripes. This pattern relieves frustration and shows distinct analogies with the cuprate layers: a bipartite lattice of antialigned spins, with axes at 90 degree angles. Substantial distinctions with cuprates are also discussed, including the tiny gap of a new variant of "charge transfer" type within the Co 3d system. | |
| dc.description | 5 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0510555 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0510555 | |
| dc.identifier | Phys. Rev. Lett. 96, 096403 (2006) | |
| dc.identifier | doi:10.1103/PhysRevLett.96.096403 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/102834 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Superconductivity | |
| dc.title | Charge and Spin Ordering in Insulating Na$_{0.5}$CoO$_2$: Effects of Correlation and Symmetry | |
| dc.type | text |