首页|Visualizing the electronic structure of kagome magnet LuMn6Sn6 by angle-resolved photoemission spectroscopy

Visualizing the electronic structure of kagome magnet LuMn6Sn6 by angle-resolved photoemission spectroscopy

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Visualizing the electronic structure of kagome magnet LuMn6Sn6 by angle-resolved photoemission spectroscopy
Searching for the dispersionless flat band(FB)in quantum materials,especially in topological systems,becomes an interesting topic.The kagome lattice is an ideal platform for such exploration because the FB can be naturally induced by the underlying destructive interference.Nevertheless,the magnetic kagome system that hosts the FB close to the Fermi level(EF)is exceptionally rare.Here,we study the electronic structure of a kagome magnet LuMn6Sn6 by combining angle-resolved photoemission spectroscopy and density functional theory calculations.The observed Fermi-surface topology and overall band dispersions are similar to previous studies of the XMn6Sn6(X=Dy,Tb,Gd,Y)family of compounds.We clearly observe two kagome-derived FBs extending through the entire Brillouin zone,and one of them is located just below EF.The photon-energy-dependent measurements reveal that these FBs are nearly dispersionless along the kz direction as well,supporting the quasi-two-dimensional character of such FBs.Our results complement the XMn6Sn6 family and demonstrate the robustness of the FB features across this family.

flat bandkagome magnetangle-resolved photoemission spectroscopy

李满、王琦、周丽琴、宋文华、马欢、丁鹏飞、Alexander Fedorov、黄耀波、Bernd Büchner、雷和畅、王善才、娄睿

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School of Information Network Security,People's Public Security University of China,Beijing 100038,China

Department of Physics,Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),and Beijing Key Laboratory of Opto-electronic Functional Materials & Micronano Devices,Renmin University of China,Beijing 100872,China

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

University of Chinese Academy of Sciences,Beijing 100049,China

Leibniz Institute for Solid State and Materials Research,IFW Dresden,Dresden 01069,Germany

Helmholtz-Zentrum Berlin für Materialien und Energie,Albert-Einstein-Stra?e 15,Berlin 12489,Germany

Joint Laboratory"Functional Quantum Materials"at BESSY Ⅱ,Berlin 12489,Germany

Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

Institute for Solid State and Materials Physics,TU Dresden,Dresden 01062,Germany

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flat band kagome magnet angle-resolved photoemission spectroscopy

2024

10.1088/1674-1056/ad7afe

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(11)