Ferromagnetic order beyond the superconducting dome in a cuprate superconductor

被引：29
作者：
Sarkar, Tarapada [1 ,2 ]
Wei, D. S. [3 ,4 ]
Zhang, J. [5 ]
Poniatowski, N. R. [1 ,2 ]
Mandal, P. R. [1 ,2 ]
Kapitulnik, A. [3 ,4 ,6 ,7 ]
Greene, Richard L. [1 ,2 ]
机构：
[1] Univ Maryland, Maryland Quantum Mat Ctr, College Pk, MD 20742 USA
[2] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[3] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA
[4] Stanford Univ, Dept Appl Sci, Stanford, CA 94305 USA
[5] Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China
[6] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[7] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci SIMES, Menlo Pk, CA 94025 USA
来源：
SCIENCE | 2020年 / 368卷 / 6490期
关键词：
SPIN FLUCTUATIONS; TEMPERATURE; MAGNETORESISTANCE; PHASE; PYROCHLORE; PSEUDOGAP; SYMMETRY;
D O I：
10.1126/science.aax1581
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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.
引用
收藏
页码：532 / +
页数：24
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