|
Correlated electronic systems with an additional complexity of a geometrically frustrated
lattice provide an exciting ground for the study of several competing interactions
among spin, orbital and lattice degrees of freedom.
In this presentation we shall discuss the role of frustration, correlation effects and spin-orbit
coupling in prototypical 3D-networks like the spinels AB2X4 which results in various orbital and magnetic orderings.
By performing density functional calculations and model considerations we analyze the nature of the structural, orbital and magnetic transitions in the Mott insulators ZnV2O4 [1], MnV2O4 [2], FeSc2S4 and FeCr2S4 [3] and
outline the importance of correlation effects and spin-orbit coupling on the behavior of these systems.
[1] T. Maitra and R. Valenti, Phys. Rev. Lett. 99, 126401 (2007). [2] S. Sarkar, T. Maitra, Roser Valenti, T. Saha-Dasgupta, Phys. Rev. Lett. 102, 216405 (2009). [3] S. Sarkar, T. Maitra, Roser Valenti, T. Saha-Dasgupta, Phys. Rev. B (RC) 82, 041105 (2010). |
|