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Chiral Majorana Fermions in two dimensional square lattice antiferromagnet with proximity-induced superconductivity.
Proximity-induced superconductivity in a two-dimensional square-lattice antiferromagnet with spin-orbit coupling and Combination of proximity-induced superconductivity and ferromagnetic exchange field in a two-dimensional square-lattice antiferromagnet with spin-orbit coupling and nonsymmorphic symmetry can induce a topological superconductor phase with chiral Majorana edge states. The lattice model of the Bogoliubov-de Gennes (BdG) Hamiltonian was applied to study the phase diagram of bulks and chiral Majorana edge states in nanoribbons. By numerically studying the phase diagram, we found that the non-uniformity of either the superconducting pairing parameters or the exchange field at the two sublattices is necessary to induce a topological superconductor phase with chiral Majorana edge states. The BdG Chern number of certain topological superconductor phases is $\pm1$ or $\pm3$, such that the corresponding nanoribbons have one or three pairs of chiral Majorana edge states, respectively.
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