期刊
SCIENCE
卷 367, 期 6485, 页码 1454-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aax3873
关键词
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资金
- National Natural Science Foundation of China [11790311, 11922409, 11674028, 51788104]
- Ministry of Science and Technology of China [2017YFA0304600, 2017YFA0302902, 2017YFA0303301, 2018YFA0307100, 2018YFA0305603, 2016YFA0301001]
- Beijing Advanced Innovation Center for Future Chip (ICFC)
Spin-orbit coupling has proven indispensable in the realization of topological materials and, more recently, Ising pairing in two-dimensional superconductors. This pairing mechanism relies on inversion symmetry-breaking and sustains anomalously large in-plane polarizing magnetic fields whose upper limit is predicted to diverge at low temperatures. Here, we show that the recently discovered superconductor few-layer stanene, epitaxially strained gray tin (alpha-Sn), exhibits a distinct type of Ising pairing between carriers residing in bands with different orbital indices near the G-point. The bands are split as a result of spin-orbit locking without the participation of inversion symmetry-breaking. The in-plane upper critical field is strongly enhanced at ultralow temperature and reveals the predicted upturn.
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