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Antiferromagnetically ordered topological semimetals in Hubbard model with spin-orbit coupling
Garima Goyal1, Dheeraj Kumar Singh1
1Department of Physics and Materials Science, Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India.
Abstract:
We examine the possible existence of Dirac semimetal with magnetic order in a two-dimensional system with a nonsymmorphic symmetry by using the Hartree-Fock mean-field theory within the Hubbard model. We locate the region in the second-neighbor spin-orbit coupling vs Hubbard interaction phase diagram, where such a state is stabilized. The edge states for the ribbons along two orthogonal directions concerning the orientation of in-plane magnetic moments are obtained. Finally, the effect of the in-plane magnetic field, which results in the stabilization of the Weyl semimetallic (WSM) state, and the nature of the edge states corresponding to the WSM state for ribbon geometries are also explored.
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