Hybridization, superexchange, and competing magnetoelastic interactions in TiOBr

Nonlinear Electro- and Magnetoelastic Interactions

Thin Film Limits in Magnetoelastic Interactions

Magnetoelastic Interactions in the Hexagonal Belorizky Model

The theory o f dynamical magnetoelasticity in the hexagonal Belorizky model is presented in this paper. We show that the interaction o f spins with lattice vibrations gives rise to multiaxis anisotropic biquadratic exchange. It is shown that this anisotropy favours some directions and can stabilize three-sublattice ordering o f the system. Formulae for low-temperature spin wave spectra were obt...

Time-resolved observation and control of superexchange interactions with ultracold atoms in optical lattices.

Quantum mechanical superexchange interactions form the basis of quantum magnetism in strongly correlated electronic media. We report on the direct measurement of superexchange interactions with ultracold atoms in optical lattices. After preparing a spin-mixture of ultracold atoms in an antiferromagnetically ordered state, we measured coherent superexchange-mediated spin dynamics with coupling e...

Potts models with competing interactions

The mock A N N N I model is generalised in replacing the Ising spins by q-state Potts variables. Performing exact dedecoration transformations for general q and using Monte Carlo techniques in two dimensions for q = 3, a multitude of distinct spatially modulated long-range ordered phases, as well as phases with algebraic order, are found 10 spring from a multiphase point.