• DOI:10.1038/s41467-021-27041-w
• Corpus ID: 240419683

Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface

@article{Cai2021EvidenceFA,
  title={Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface},
  author={Ranran Cai and Yunyan Yao and Peng-Li Lv and Yang Ma and Wenyu Xing and Boning Li and Yuan Ji and Huibin Zhou and Chenghao Shen and Shuang Jia and X. C. Xie and Igor Žuti{\'c} and Qing Sun and Wei Han},
  journal={Nature Communications},
  year={2021},
  volume={12}
}

• Ranran Cai, Yunyan Yao, +11 authors W. Han
• Published 2 November 2021
• Physics
• Nature Communications

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.