Dynamical response functions in the quantum Ising chain with a boundary
(2007)
Critical phenomena in a highly constrained classical spin system: Neel ordering from the Coulomb phase
ArXiv 0708.3791 (2007)
Abstract:
Many classical, geometrically frustrated antiferromagnets have macroscopically degenerate ground states. In a class of three-dimensional systems, the set of degenerate ground states has power-law correlations and is an example of a Coulomb phase. We investigate Neel ordering from such a Coulomb phase, induced by weak additional interactions that lift the degeneracy. We show that the critical point belongs to a universality class that is different from the one for the equivalent transition out of the paramagnetic phase, and that it is characterised by effective long-range interactions; alternatively, ordering may be discontinuous. We suggest that a transition of this type may be realised by applying uniaxial stress to a pyrochlore antiferromagnet.Reversible self-assembly of patchy particles into monodisperse icosahedral clusters.
J Chem Phys 127:8 (2007) 085106