Eur. Phys. J. B (2021) 94: 98
https://doi.org/10.1140/epjb/s10051-021-00104-z

Regular Article - Solid State and Materials

Vortical patterns in bulk superconducting systems with mixed pairing orders

Department of Physics and Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, 200444, Shanghai, China

^b zgq_1981@shu.edu.cn

Received: 13 March 2021
Accepted: 19 April 2021
Published online: 6 May 2021

Abstract

Based on a model Hamiltonian including the on-site repulsive interaction among the electrons, we investigate the spatial configurations of mixed spin-triplet (dominant p-wave) and spin-singlet (coexisted s-wave and d-wave) pairing symmetries in bulk superconducting systems by numerically solving the Bogoliubov–de Gennes equations. The influences of the Zeeman field and the next-nearest-neighbor hopping on the order-parameter modulations are mainly discussed. Besides the quantized vortex states with point-like cores, the unclosed vortex chains and enclosed skyrmionic modes can remain stable in the present bulk sample. Furthermore, nonuniform patterns of the vortex lattice and the elliptical-like vortices can be obtained at appropriate applied flux. The corresponding zero-energy local density of states as well as the relative phase differences useful to display the skyrmionic texture are provided