Magnetic transition and orbital degrees of freedom in vanadium spinels
| dc.creator | Tsunetsugu, Hirokazu | |
| dc.creator | Motome, Yukitoshi | |
| dc.date | 2003-05-12 | |
| dc.date.accessioned | 2026-07-07T02:51:18Z | |
| dc.date.available | 2026-07-07T02:51:18Z | |
| dc.description | We propose a scenario for the two phase transitions in $A$V$_2$O$_4$ ($A$=Zn, Mg, Cd), based on an effective spin-orbital model on the pyrochlore lattice. At high temperatures, spin correlations are strongly frustrated due to the lattice structure, and the transition at $\sim$50 [K] is an orbital order, supported by Jahn-Teller lattice distortion. This orbital order introduces spatial modulation of spin exchange couplings depending on the bond direction. This partially releases the frustration, and leads to a spin order at $\sim$40 [K]. We also study the stable spin configuration by taking account of third-neighbor exchange couplings and quantum fluctuations. The result is consistent with the experimental results. | |
| dc.description | 4 pages, 4 figures, submitted to Phys. Rev. B | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0305269 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0305269 | |
| dc.identifier | Phys. Rev. B 68, 060405(R) (2003) | |
| dc.identifier | doi:10.1103/PhysRevB.68.060405 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/21398 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Magnetic transition and orbital degrees of freedom in vanadium spinels | |
| dc.type | text |