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Friday, November 10th 2017

12:20 pm:

Z2 vortex crystals have been recently shown to be

realized in triangular Kitaev-Heisenberg systems. These Z2 vortices are

stabilized by spin-orbit coupling introduced via the Kitaev term in the

Hamiltonian. Here, we analyze the magnetic excitations of these Z2 vortex

crystals and investigate the spin wave spectrum, energy gap and

dynamical spin structure factor in terms of the interplay between the

Kitaev and isotropic Heisenberg interaction.

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