Plasmon-magnon interactions in two-dimensional honeycomb magnets

Intra-atomic aspects of magnon-plasmon interactions

Vortex-vacancy interactions in two-dimensional easy-plane magnets

For a model with isotropic nearest neighbor exchange combined with easy-plane exchange or single-ion anisotropies, the static effects of a magnetic vacancy site on a nearby magnetic vortex are analyzed on square, hexagonal and triangular lattices. Numerical energy minimization and linear stability analysis using the vortex instability mode are employed. When the vortex is centered on a vacancy,...

Dipolar Interaction in 2d Honeycomb Magnets

The classical ground state of a system of dipoles arranged on a 2D honeycomb lattice is rigorously shown to be a (1/3,−1/3) structure. This configuration exhibits a continuous degeneracy with respect to rotations of the two hexagonal sublattices in opposite directions. These results are in agreement with observations on ErBr3, suggesting that dipolar interactions are dominant in the latter comp...

Dynamics of Vortices in Two-Dimensional Magnets

Theories, simulations and experiments on vortex dynamics in quasi-two-dimensional magnetic materials are reviewed. These materials can be modelled by the classical two-dimensional anisotropic Heisenberg model with XY (easy-plane) symmetry. There are two types of vortices, characterized by their polarization (a second topological charge in addition to the vorticity): Planar vortices have Newtoni...

BaNi2V2O8 : A two-dimensional honeycomb antiferromagnet

N. Rogado, Q. Huang, J. W. Lynn, A. P. Ramirez, D. Huse, and R. J. Cava Department of Chemistry and Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544 NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 Department of Thermal Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Department of...