Abstract
In the framework of the microscopic Bogoliubov-de Gennes theory, we study the spatial configurations of topological defects under high external magnetic field in mesoscopic p-wave superconducting square systems. Besides the multivortex state with four conventional vortices, two novel types of multiskyrmionic states containing four separated coreless skyrmions with the topological charge Q = 2 or Q = 3 can be obtained as the ground states, accompanied with the half-quantum vortex-antivortex pair in one or two components of the order parameter. Moreover, when the superconducting pairing interaction is enlarged, more complex single or multiple skyrmionic structures as well as the skyrmion-vortex coexisting modes can remain (meta-)stable in the mesoscopic chiral sample.
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