Pseudo-Ising superconductivity induced by -wave magnetism
Phys. Rev. B 112, 214504 – Published 3 December, 2025
DOI: https://doi.org/10.1103/cm1l-1rsh
Abstract
Unconventional magnetic orders usually interplay with superconductivity in intriguing ways. Here, we propose that a conventional superconductor in proximity to a compensated -wave magnet exhibits behaviors analogous to those of Ising superconductivity found in transition-metal dichalcogenides, which we refer to as pseudo-Ising superconductivity. The pseudo-Ising superconductivity is characterized by several distinctive features: (i) it stays much more robust under strong -wave magnetism than usual ferromagnetism or -wave altermagnetism, owing to the apparent time-reversal symmetry in -wave spin splitting; (ii) in the low-temperature regime, a second-order superconducting phase transition occurs at a significantly enhanced in-plane upper critical magnetic field ; (iii) the supercurrent-carrying state establishes nonvanishing out-of-plane spin magnetization, which is forbidden by symmetry in Rashba and Ising superconductors. We further propose a spin-orbit-free scheme to realize Majorana zero modes by placing superconducting quantum wires on a -wave magnet. Our work establishes another form of unconventional superconductivity generated by -wave magnetism.