2021/11/02 by Ranran Cai, Yunyan Yao, Peng Lv +14 · 43 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Andreev reflection #Bound state #Condensed matter physics #Ferromagnetism #Magnetic field #Magnetoresistance #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Spintronics #Spin–orbit interaction #Superconductivity #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.supr-con #van der Waals force
paper · pdf · doi:10.1038/s41467-021-27041-w
published in arXiv (Cornell University) 12(1), 6725 (Cornell University)
openalex publication_date 2021/11/02 · arxiv created 2021/11/20 · arxiv updated 2021/11/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Fundamental symmetry breaking and relativistic spin-orbit coupling give rise to fascinating phenomena in quantum materials. Of particular interest are the interfaces between ferromagnets and common s-wave superconductors, where the emergent spin-orbit fields support elusive spin-triplet superconductivity, crucial for superconducting spintronics and topologically-protected Majorana bound states. Here, we report the observation of large magnetoresistances at the interface between a quasi-two-dimensional van der Waals ferromagnet Fe0.29TaS2 and a conventional s-wave superconductor NbN, which provides the possible experimental evidence for the spin triplet Andreev reflection and induced spin-triplet superconductivity at ferromagnet/superconductor interface arising from Rashba spin-orbit coupling. The temperature, voltage, and interfacial barrier dependences of the magnetoresistance further support the induced spin-triplet superconductivity and spin-triplet Andreev reflection. This discovery, together with the impressive advances in two-dimensional van der Waals ferromagnets, opens an important opportunity to design and probe superconducting interfaces with exotic properties.