Talk Title: Magnetism and multiorbital models in the iron-based superconductors I will talk about some latest progress on the Iron-based
superconductors, especially the magnetism and multiorbital models. I will show
how to describe the magnetism using the local moment picture and compare with
neutron scattering experiments. We found that the superconductivity in all
Fe-based materials may have a common magnetic origin that is intimately
associated with the next-nearest-neighbor magnetic exchange interactions. I will also talk about the two-orbital, three-orbital and five orbital models, compare results with neutron scattering, ARPES, STM, etc. The charge stripes in the two-orbital Hubbard model for iron pnictides will be discussed. |