中国物理B ›› 2025, Vol. 34 ›› Issue (1): 17101-017101.doi: 10.1088/1674-1056/ad925d

• • 上一篇    

Electronic band structures of topological kagome materials

Man Li(李满)1,†, Huan Ma(马欢)2,†, Rui Lou(娄睿)3,4,5,‡, and Shancai Wang(王善才)2,§   

  1. 1 School of Information Network Security, People's Public Security University of China, Beijing 100038, China;
    2 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;
    3 Leibniz Institute for Solid State and Materials Research, IFW Dresden, 01069 Dresden, Germany;
    4 Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Stra?e 15, 12489 Berlin, Germany;
    5 Joint Laboratory "Functional Quantum Materials" at BESSY II, 12489 Berlin, Germany
  • 收稿日期:2024-06-26 修回日期:2024-08-19 接受日期:2024-11-14 发布日期:2024-12-06
  • 通讯作者: Rui Lou, Shancai Wang E-mail:lourui09@gmail.com;scw@ruc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12204536), the Fundamental Research Funds for the Central Universities, and the Research Funds of People’s Public Security University of China (PPSUC) (Grant No. 2023JKF02ZK09).

Electronic band structures of topological kagome materials

Man Li(李满)1,†, Huan Ma(马欢)2,†, Rui Lou(娄睿)3,4,5,‡, and Shancai Wang(王善才)2,§   

  1. 1 School of Information Network Security, People's Public Security University of China, Beijing 100038, China;
    2 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;
    3 Leibniz Institute for Solid State and Materials Research, IFW Dresden, 01069 Dresden, Germany;
    4 Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Stra?e 15, 12489 Berlin, Germany;
    5 Joint Laboratory "Functional Quantum Materials" at BESSY II, 12489 Berlin, Germany
  • Received:2024-06-26 Revised:2024-08-19 Accepted:2024-11-14 Published:2024-12-06
  • Contact: Rui Lou, Shancai Wang E-mail:lourui09@gmail.com;scw@ruc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12204536), the Fundamental Research Funds for the Central Universities, and the Research Funds of People’s Public Security University of China (PPSUC) (Grant No. 2023JKF02ZK09).

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摘要： The kagome lattice has garnered significant attention due to its ability to host quantum spin Fermi liquid states. Recently, the combination of unique lattice geometry, electron-electron correlations, and adjustable magnetism in solid kagome materials has led to the discovery of numerous fascinating quantum properties. These include unconventional superconductivity, charge and spin density waves (CDW/SDW), pair density waves (PDW), and Chern insulator phases. These emergent states are closely associated with the distinctive characteristics of the kagome lattice's electronic structure, such as van Hove singularities, Dirac fermions, and flat bands, which can exhibit exotic quasi-particle excitations under different symmetries and magnetic conditions. Recently, various quantum kagome materials have been developed, typically consisting of kagome layers stacked along the $z$-axis with atoms either filling the geometric centers of the kagome lattice or embedded between the layers. In this topical review, we begin by introducing the fundamental properties of several kagome materials. To gain an in-depth understanding of the relationship between topology and correlation, we then discuss the complex phenomena observed in these systems. These include the simplest kagome metal $T_3X$, kagome intercalation metal $TX$, and the ternary compounds $AT_6X_6$ and $RT_3X_5$ ($A = {\rm Li}$, Mg, Ca, or rare earth; $T = {\rm V}$, Cr, Mn, Fe, Co, Ni; $X = {\rm Sn}$, Ge; $R = {\rm K}$, Rb, Cs). Finally, we provide a perspective on future experimental work in this field.

关键词: kagome lattice, quasi-particle excitation, electronic correlation, magnetism

Abstract: The kagome lattice has garnered significant attention due to its ability to host quantum spin Fermi liquid states. Recently, the combination of unique lattice geometry, electron-electron correlations, and adjustable magnetism in solid kagome materials has led to the discovery of numerous fascinating quantum properties. These include unconventional superconductivity, charge and spin density waves (CDW/SDW), pair density waves (PDW), and Chern insulator phases. These emergent states are closely associated with the distinctive characteristics of the kagome lattice's electronic structure, such as van Hove singularities, Dirac fermions, and flat bands, which can exhibit exotic quasi-particle excitations under different symmetries and magnetic conditions. Recently, various quantum kagome materials have been developed, typically consisting of kagome layers stacked along the $z$-axis with atoms either filling the geometric centers of the kagome lattice or embedded between the layers. In this topical review, we begin by introducing the fundamental properties of several kagome materials. To gain an in-depth understanding of the relationship between topology and correlation, we then discuss the complex phenomena observed in these systems. These include the simplest kagome metal $T_3X$, kagome intercalation metal $TX$, and the ternary compounds $AT_6X_6$ and $RT_3X_5$ ($A = {\rm Li}$, Mg, Ca, or rare earth; $T = {\rm V}$, Cr, Mn, Fe, Co, Ni; $X = {\rm Sn}$, Ge; $R = {\rm K}$, Rb, Cs). Finally, we provide a perspective on future experimental work in this field.

Key words: kagome lattice, quasi-particle excitation, electronic correlation, magnetism

中图分类号:  (Electron density of states and band structure of crystalline solids)

  • 71.20.-b
79.60.-i (Photoemission and photoelectron spectra)