Ferromagnetism and superconductivity are generally considered to be antagonistic phenomena in condensed matter physics. Here, we theoretically study the interplay between the ferromagnetic and superconducting orders in a recent discovered monolayered CoSb superconductor with an orthorhombic symmetry and net magnetization, and demonstrate the pairing symmetry of CoSb as a candidate of non-unitary superconductor with time-reversal symmetry breaking. By performing the group theory analysis and the first-principles calculations, the superconducting order parameter is suggested to be a triplet pairing with the irreducible representation of ³B_2u, which displays intriguing nodal points and non-zero periodic modulation of Cooper pair spin polarization on the Fermi surface topologies. These findings not only provide a significant theoretical insight into the coexistence of superconductivity and ferromagnetism, but also reveal the exotic spin polarized Cooper pairing driven by ferromagnetic spin fluctuations in a triplet superconductor.

在凝聚态物理中，铁磁性和超导性通常被视为对立现象。在这里，我们从理论上研究了最近发现的具有正交对称性和净磁化强度的单层CoSb超导体中铁磁和超导阶之间的相互作用，并证明了CoSb作为具有时间逆向对称性破缺的非整体超导体的候选者的配对对称性。通过进行群论分析和第一性原理计算，超导阶数参数被认为是三重态对，具有不可约的³ B _{2 u}表示。，在费米表面拓扑上显示出有趣的节点和库珀对自旋极化的非零周期调制。这些发现不仅为超导性和铁磁性的共存提供了重要的理论见解，而且还揭示了由三重态超导体中铁磁自旋涨落驱动的奇异的自旋极化库珀对。