Anisotropy gap in the magnon dispersion of Na2IrO3
We recently succeeded in performing INS experiments on the magnetic excitations on Na2IrO3, which in spite of its AFM ground state is considered to be a candidate for the Kitaev model on a honeycomb lattice. The experiments reveal the low energy dispersion in one direction but show now magnon gap above 2meV. In order to determine this gap, higher resolution data is required that will also allow us to determine the small dispersion perpendicular to the layers.
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BERTIN Alexandre; M. Braden and STEFFENS Paul. (2020). Anisotropy gap in the magnon dispersion of Na2IrO3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-05-791
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