期刊
SCIENCE
卷 362, 期 6420, 页码 1271-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao0980
关键词
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资金
- Berkeley Lab's program on Ultrafast Materials Sciences - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division [DE-AC02-05CH11231]
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4859, GBMF4307]
- Quantum Materials Program at Lawrence Berkeley National Laboratory - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division [DE-AC02-05CH11231]
- DOE Office of Science User Facility [DE-AC02-05CH11231]
- Ministry of Science and Technology of China [2016YFA0300501]
- NSF China [11674224]
Cuprate superconductors have long been thought of as having strong electronic correlations but negligible spin-orbit coupling. Using spin- and angle-resolved photoemission spectroscopy, we discovered that one of the most studied cuprate superconductors, Bi2212, has a nontrivial spin texture with a spin-momentum locking that circles the Brillouin zone center and a spin-layer locking that allows states of opposite spin to be localized in different parts of the unit cell. Our findings pose challenges for the vast majority of models of cuprates, such as the Hubbard model and its variants, where spin-orbit interaction has been mostly neglected, and open the intriguing question of how the high-temperature superconducting state emerges in the presence of this nontrivial spin texture.
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