中国物理B(英文版)2024,Vol.33Issue(8) :474-480.DOI:10.1088/1674-1056/ad4019

Experimental observation of Fermi-level flat band in novel kagome metal CeNi5

陈学智 王乐 张帅 张任杰 程以伟 胡裕栋 孟承诺 刘正太 吕佰晴 黄耀波
中国物理B(英文版)2024,Vol.33Issue(8) :474-480.DOI:10.1088/1674-1056/ad4019

Experimental observation of Fermi-level flat band in novel kagome metal CeNi5

陈学智 1王乐 2张帅 3张任杰 4程以伟 1胡裕栋 5孟承诺 6刘正太 7吕佰晴 8黄耀波9
扫码查看

作者信息

  • 1. Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China;University of Chinese Academy of Sciences,Beijing 100049,China
  • 2. Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China;International Quantum Academy,Shenzhen 518048,China
  • 3. Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China
  • 4. Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China;University of Chinese Academy of Sciences,Beijing 100049,China;Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China
  • 5. Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China
  • 6. Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China
  • 7. Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China
  • 8. Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China;School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;Zhangjiang Institute for Advanced Study,Shanghai Jiao Tong University,Shanghai 200240,China
  • 9. Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China
  • 折叠

Abstract

Kagome materials are a class of material with a lattice structure composed of corner-sharing triangles that produce various exotic electronic phenomena,such as Dirac fermions,van Hove singularities,and flat bands.However,most of the known kagome materials have a flat band detached from the Fermi energy,which limits the investigation of the emergent flat band physics.In this work,by combining soft x-ray angle-resolved photoemission spectroscopy(ARPES)and the first-principles calculations,the electronic structure is investigated of a novel kagome metal CeNi5 with a clear dispersion along the kz direction and a Fermi level flat band in the Γ-K-M-Γ plane.Besides,resonant ARPES experimental results indicate that the valence state of Ce ions is close to 4+,which is consistent with the transport measurement result.Our results demonstrate the unique electronic properties of CeNi5 as a new kagome metal and provide an ideal platform for exploring the flat band physics and the interactions between different types of flat bands by tuning the valence state of Ce ions.

Key words

ARPES/kagome lattice/band structure/flat band

引用本文复制引用

基金项目

Science Fund from Shanghai Committee of Science and Technology,China(23JC1403300)

Shanghai Municipal Science and Technology Major Project,China()

TDLI Starting up Grant()

National Natural Science Foundation of China(12374063)

National Natural Science Foundation of China(12204223)

National Natural Science Foundation of China(23Z990202580)

Fund from the Ministry of Science and Technology of China(2023YFA1407400)

Shanghai Natural science Fund for Original Exploration Program,China(23ZR1479900)

Shanghai Talent Program,China()

出版年

2024
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
段落导航相关论文