In conventional s-wave superconductors, ferromagnetism is strongly suppressed, due to the singlet pairing of the electrons. Here, Xiang, He, Lin, and coauthors find a long-range ferromagnetic order among impurity sites in the spin-orbit coupled Fe(Se,Te) using scanning superconducting quantum interference device microscopy.
- Bingke Xiang
- Qiushi He
- Yihua Wang