期刊
SCIENCE
卷 368, 期 6490, 页码 532-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aax1581
关键词
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资金
- NSF [DMR-1708334]
- AFSOR [FA9550-14-10332]
- Maryland Quantum Materials Center
- Department of Energy, Office of Basic EnergSyciences [DE-AC02-76SF00515]
- Karel Urbanek Postdoctoral Fellowship in Applied Physics at Stanford University
- Chinese Government Scholarship of China Scholarship Council
- QuantEmX grant from ICAM
- Gordon and Betty Moore Foundation [GBMF5305]
According to conventional wisdom, the extraordinary properties of the cuprate high-temperature superconductors arise from doping a strongly correlated antiferromagnetic insulator. The highly overdoped cuprates-whose doping lies beyond the dome of superconductivity-are considered to be conventional Fermi liquid metals. We report the emergence of itinerant ferromagnetic order below 4 kelvin for doping beyond the superconducting dome in thin films of electron-doped La2-x,CexCuO4 (LCCO). The existence of this ferromagnetic order is evidenced by negative, anisotropic, and hysteretic magnetoresistance, hysteretic magnetization, and the polar Kerr effect all of which are standard signatures of itinerant ferromagnetism in metals. This surprising result suggests that the overdoped cuprates are strongly influenced by electron correlations.
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