Charge ordering in the spinels AlV$_2$O$_4$ and LiV$_2$O$_4$
| dc.creator | Zhang, Y. Z. | |
| dc.creator | Fulde, P. | |
| dc.creator | Thalmeier, P. | |
| dc.creator | Yaresko, A. | |
| dc.date | 2005-01-18 | |
| dc.date.accessioned | 2026-07-07T06:21:24Z | |
| dc.date.available | 2026-07-07T06:21:24Z | |
| dc.description | We develop a microscopic theory for the charge ordering (CO) transitions in the spinels AlV$_2$O$_4$ and LiV$_2$O$_4$ (under pressure). The high degeneracy of CO states is lifted by a coupling to the rhombohedral lattice deformations which favors transition to a CO state with inequivalent V(1) and V(2) sites forming Kagomé and trigonal planes respectively. We construct an extended Hubbard type model including a deformation potential which is treated in unrestricted Hartree Fock approximation and describes correctly the observed first-order CO transition. We also discuss the influence of associated orbital order. Furthermore we suggest that due to different band fillings AlV$_2$O$_4$ should remain metallic while LiV$_2$O$_4$ under pressure should become a semiconductor when charge disproportionation sets in. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0501408 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0501408 | |
| dc.identifier | J. Phys. Soc. Jpn. Vol. 74, No. 8, 2153 (2005) | |
| dc.identifier | doi:10.1143/JPSJ.74.2153 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/95589 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Charge ordering in the spinels AlV$_2$O$_4$ and LiV$_2$O$_4$ | |
| dc.type | text |