2025/12/21 by Yuri Fukaya, Fukaya, Yuri, Keiji Yada +3
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Topological Materials and Phenomena
paper · doi:10.48550/arxiv.2512.18636
openalex publication_date 2025/12/21 · openalex created_date 2025/12/24 · openalex updated_date 2026/07/28
We study the surface density of states in p-wave unconventional magnet-spin-singlet s-wave superconductor hybrid systems (p-wave unconventional magnetic superconductors). Owing to the noncollinear spin structure in p-wave unconventional magnets, the spin-singlet s-wave pair potential behaves as the spin-triplet p-wave superconductivity. As a result, zero-energy flat bands can emerge at the edge. Analyzing the pair amplitude at the edge, odd-frequency spin-triplet even-parity pairing is induced in the presence of zero-energy flat bands, while even-frequency spin-singlet even-parity remains. We also demonstrate the Josephson current in superconducting junctions with p-wave unconventional magnet-spin-singlet s-wave superconductor hybrid systems. By the cooperation of spin-singlet s-wave pair potential and the p-wave unconventional magnetic order, the coupling of the spin-singlet even-parity pairings in junctions generates the first harmonics of the Josephson current. In addition, the temperature dependence of the maximum Josephson current can be tuned by the chemical potential, which determines the generation of zero-energy flat bands. Our results indicate that s+p-wave-like superconducting state is generated in p-wave unconventional magnet-s-wave superconductor hybrid systems.