文献详情
Negative flat band magnetism in a spin-orbit-coupled correlated kagome magnet
文献类型：期刊
通讯作者：Hasan, MZ (reprint author), Princeton Univ, Dept Phys, Lab Topol Quantum Matter & Adv Spect B7, Princeton, NJ 08544 USA.; Hasan, MZ (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.; Hasan, MZ (reprint author), Princeton Univ, Princeton Inst Sci & Technol Mat, Princeton, NJ 08544 USA.
期刊名称：NATURE PHYSICS影响因子和分区
年：2019
卷：15
期：5
页码：443-+
ISSN：1745-2473
所属部门：物理学系
摘要：Electronic systems with flat bands are predicted to be a fertile ground for hosting emergent phenomena including unconventional magnetism and superconductivity(1-15), but materials that manifest this feature are rare. Here, we use scanning tunnelling microscopy to elucidate the atomically resolved electronic states and their magnetic response in the kagome magnet Co3Sn2S2 (refs.(16-20)). We observe a pronounced peak at the Fermi level, which we identify as arising from the kinetically frustrated ...More
Electronic systems with flat bands are predicted to be a fertile ground for hosting emergent phenomena including unconventional magnetism and superconductivity(1-15), but materials that manifest this feature are rare. Here, we use scanning tunnelling microscopy to elucidate the atomically resolved electronic states and their magnetic response in the kagome magnet Co3Sn2S2 (refs.(16-20)). We observe a pronounced peak at the Fermi level, which we identify as arising from the kinetically frustrated kagome flat band. On increasing the magnetic field up to +/- 8 T, this state exhibits an anomalous magnetizationpolarized many-body Zeeman shift, dominated by an orbital moment that is opposite to the field direction. Such negative magnetism is induced by spin-orbit-coupling quantum phase effects(21-25) tied to non-trivial flat band systems. We image the flat band peak, resolve the associated negative magnetism and provide its connection to the Berry curvature field, showing that Co3Sn2S2 is a rare example of a kagome magnet where the low-energy physics can be dominated by the spin-orbit-coupled flat band. ...Hide

DOI：10.1038/s41567-019-0426-7
百度学术：Negative flat band magnetism in a spin-orbit-coupled correlated kagome magnet
语言：外文
被引频次：12
人气指数：2
浏览次数：2
基金：Gordon and Betty Moore FoundationGordon and Betty Moore Foundation [GBMF4547]; United States Department of Energy (US DOE)United States Department of Energy (DOE) [DOE/BES DE-FG-02-05ER46200]; Ministry of Science and Technology of ChinaMinistry of Science and Technology, China [2016YFA0300504]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [11574394, 11774423, 11822412]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities; Renmin University of China [15XNLF06, 15XNLQ07, 18XNLG14]; European Union's Horizon 2020 research and innovation programme [ERC-StG-Neupert-757867-PARATOP]; US DOEUnited States Department of Energy (DOE) [DE-FG02-99ER45747]; Natural Science Foundation of ChinaNational Natural Science Foundation of China [11790313, 11774007]; Key Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDPB08-1]; National Key R&D Program of China [2016YFA0300403, 2018YFA035601]; Lawrence Berkeley National LaboratoryUnited States Department of Energy (DOE); Miller Institute of Basic Research in Science at the University of California, Berkeley
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