期刊
NATURE COMMUNICATIONS
卷 8, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-017-02122-x
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资金
- National Science Foundation [DMR-1157490]
- State of Florida
- European Research Council [ERC-319286 QMAC]
- LABEX PALM [ANR-10-LABX-0039-PALM]
- DOD-ARMY in the United States [W911NF-16-1-0559]
- Canadian Institute for Advanced Research (CIFAR)
- Natural Sciences and Engineering Research Council of Canada (NSERC) [PIN: 123817]
- Fonds de recherche du Quebec - Nature et Technologies (FRQNT)
- Canada Foundation for Innovation (CFI)
- Canada Research Chair
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF5306]
- Grants-in-Aid for Scientific Research [17H01140] Funding Source: KAKEN
The properties of cuprate high-temperature superconductors are largely shaped by competing phases whose nature is often a mystery. Chiefly among them is the pseudogap phase, which sets in at a doping p* that is material-dependent. What determines p* is currently an open question. Here we show that the pseudogap cannot open on an electron-like Fermi surface, and can only exist below the doping pFS at which the large Fermi surface goes from hole-like to electron-like, so that p* <= p(FS). We derive this result from high-magnetic-field transport measurements in La1.6-xNd0.4SrxCuO4 under pressure, which reveal a large and unexpected shift of p* with pressure, driven by a corresponding shift in pFS. This necessary condition for pseudogap formation, imposed by details of the Fermi surface, is a strong constraint for theories of the pseudogap phase. Our finding that p* can be tuned with a modest pressure opens a new route for experimental studies of the pseudogap.
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