Electronic structure study of the charge-density-wave Kondo lattice CeTe3
Electronic structure study of the charge-density-wave Kondo lattice CeTe3
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DOI：
10.1088/1674-1056/acb41e
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发表时间：
2023
影响因子：
1.7
通讯作者：
Qiuyun Chen
中科院分区：
文献类型：
--
作者：
Bo Wang;Rui Zhou;Xuebing Luo;Yun Zhang;Qiuyun Chen
Abstract. The behaviors of f electrons are crucial for understanding the rich phase diagrams and ground-state properties of heavy fermion (HF) systems. The complicated interactions between f electrons and conduction electrons largely enrich the basic properties of HF compounds. Here the electronic structure, especially the f-electron character, of the charge-density-wave (CDW) Kondo lattice compound CeTe3 has been studied by high resolution angle-resolved photoemission spectroscopy. A weakly dispersive quasiparticle band near the Fermi level has been observed directly, indicating hybridization between f electrons and conduction electrons. Temperature-dependent measurements conform the localized to itinerant transition of f electrons as the temperature decreases. Furthermore, an energy gap formed by one conduction band at low temperature is gradually closed with increasing temperature, which is probably originated from the CDW transition at extremely high temperature. In the meantime, with different photon energies and polarizations, orbital information of different electrons has also been acquired, which indicates the anisotropy and diverse symmetries of orbitals. Our results may help understand the complicated f-electron behaviors when considering its interaction with other electrons/photons in CeTe3 and other related compounds.
