The Schwinger boson mean-field theory: application to the Dzyaloshinskii-Moriya interaction on the Kagomé lattice

Wednesday 28 Oct 2009, 11:15 → 12:15 Europe/Zurich

EPFL, Salle 727 du BSP

Few theoretical tools are able to describe strong quantum fluctuations. Among them, the Schwinger boson mean-field theory (SBMFT) is known to possibly describe resonating valence bond spin liquids as well as magnetically ordered states. After a presentation of the method, I will show the phase diagram of the Heisenberg antiferromagnet on the Kagomé lattice perturbed by a DM interaction. The influence of the spin value will be analysed. We will show the results of dynamical structure factor calculations in different regions of the phase diagram.