2020/10/15 by Da Jiang, Tianzhong Yuan, Yongzheng Wu +4
Materials Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Cooper pair #Electric field #Heterojunction #Iron-based superconductors research #Magnetic field #Materials science #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con #van der Waals force
paper · pdf · doi:10.1021/acsami.0c15203
published as ACS Appl. Mater. Interfaces 12, 49252 (2020) · 24
openalex publication_date 2020/10/15 · arxiv created 2020/11/05 · arxiv updated 2020/11/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A magnetic field is generally considered to be incompatible with superconductivity as it tends to spin-polarize electrons and breaks apart the opposite-spin singlet superconducting Cooper pairs. Here, an experimental phenomenon is observed that an intriguing reemergent superconductivity evolves from a conventional superconductivity undergoing a hump-like intermediate phase with a finite electric resistance in the van der Waals heterointerface of layered NbSe 2 and CrCl 3 flakes. This phenomenon merely occurred when the applied magnetic field is parallel to the sample plane and perpendicular to the electric current direction as compared to the reference sample of a NbSe 2 thin flake. The strong anisotropy of the reemergent superconducting phase is pointed to the nature of the Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state driven by the strong interfacial spin–orbit coupling between NbSe 2 and CrCl 3 layers. The theoretical picture of FFLO state nodes induced by Josephson vortices collectively pinning is presented for well understanding the experimental observation of the reemergent superconductivity. This finding sheds light on an opportunity to search for the exotic FFLO state in the van der Waals heterostructures with strong interfacial spin–orbit coupling.