| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Experimental Observation of Electronic Structures of Kagome Metal YCr$_{6}$Ge$_{6}$ |
| Pengdong Wang1, Yihao Wang2, Bo Zhang1, Yuliang Li1, Sheng Wang1, Yunbo Wu1, Hongen Zhu1, Yi Liu1, Guobin Zhang1, Dayong Liu3*, Yimin Xiong2*, and Zhe Sun1,4,5* |
1National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
2Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
3Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
4Key Laboratory of Strongly Coupled Quantum Matter Physics, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China
5CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai 200050, China
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| Cite this article: |
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Pengdong Wang, Yihao Wang, Bo Zhang et al 2020 Chin. Phys. Lett. 37 087102 |
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Abstract Using angle-resolved photoemission spectroscopy, we study electronic structures of a Kagome metal YCr$_{6}$Ge$_{6}$. Band dispersions along $k_{z}$ direction are significant, suggesting a remarkable interlayer coupling between neighboring Kagome planes. Comparing ARPES data with first-principles calculations, we find a moderate electron correlation in this material, since band calculations must be compressed in the energy scale to reach an excellent agreement between experimental data and theoretical calculations. Moreover, as indicated by band calculations, there is a flat band in the vicinity of the Fermi level at the $\varGamma$–$M$–$K$ plane in the momentum space, which could be responsible for the unusual transport behavior in YCr$_{6}$Ge$_{6}$.
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Received: 08 May 2020
Published: 28 July 2020
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| PACS: |
71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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73.20.-r
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(Electron states at surfaces and interfaces)
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73.20.At
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(Surface states, band structure, electron density of states)
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41.60.Ap
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(Synchrotron radiation)
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| Fund: Supported by the National Key R&D Program of China (Grant Nos. 2017YFA0402901, 2016YFA0401004 and 2016YFA0300404), the National Natural Science Foundation of China (Grant Nos. 11674296, 11974354 and U1432138), the Key Research Program of the Chinese Academy of Sciences (Grant No. XDPB01), the Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology (Grant No. 2018CXFX002), the Collaborative Innovation Program of Hefei Science Center, CAS (Grant No. 2019HSC-CIP007), and the High Magnetic Field Laboratory of Anhui Province. |
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