University of Minnesota
School of Physics & Astronomy

Condensed Matter Sack Lunch Seminar

Friday, November 10th 2017
12:20 pm:
Speaker: Mengqun Li, University of Minnesota
Subject: Magnetic excitations in Z2 vortex crystals

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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