期刊
PHYSICAL REVIEW X
卷 8, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.8.021002
关键词
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资金
- National Basic Research Program of China [2013CB934600, 2017YFA0303302, 2016YFA0301004, 2015CB921102, 2017YFA0303301, 2017YFA0304600]
- National Natural Science Foundation of China [11774008, 11534001, 11674028]
- Open Project Program of the Pulsed High Magnetic Field Facility at the Huazhong University of Science and Technology [PHMFF2015002]
- Key Research Program of the Chinese Academy of Sciences [XDPB08-1]
- Fundamental Research Funds for the Central Universities
Two-dimensional (2D) superconducting systems are of great importance for exploring exotic quantum physics. The recent development of fabrication techniques has stimulated studies of high-quality single-crystalline 2D superconductors, where intrinsic properties give rise to unprecedented physical phenomena. Here, we report the observation of Zeeman-type spin-orbit interaction protected superconductivity (Zeeman-protected superconductivity) in 4-monolayer (ML) to 6-ML crystalline Pb films grown on striped incommensurate Pb layers on Si(111) substrates by molecular beam epitaxy. An anomalously large in-plane critical field far beyond the Pauli limit is detected, which can be attributed to the Zeeman-protected superconductivity due to the in-plane inversion symmetry breaking at the interface. Our work demonstrates that, in superconducting heterostructures, the interface can induce Zeeman-type spin-orbit interactions and modulate the superconductivity.
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