| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Electronic structure study of the charge-density-wave Kondo lattice CeTe3 |
| Bo Wang(王博)†, Rui Zhou(周锐)†, Xuebing Luo(罗学兵), Yun Zhang(张云)‡, and Qiuyun Chen(陈秋云)§ |
| Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621907, China |
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Abstract The behaviors of m f electrons are crucial for understanding the rich phase diagrams and ground-state properties of heavy fermion (HF) systems. The complicated interactions between m f electrons and conduction electrons largely enrich the basic properties of HF compounds. Here the electronic structure, especially the m 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 m f electrons and conduction electrons. Temperature-dependent measurements confirm the localized to itinerant transition of m 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 probably originates from the CDW transition at extremely high temperature. Additionally, orbital information of different electrons has also been acquired with different photon energies and polarizations, which indicates the anisotropy and diverse symmetries of the orbitals. Our results may help understand the complicated m f-electron behaviors when considering its interaction with other electrons/photons in CeTe3 and other related compounds.
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Received: 17 October 2022
Revised: 25 December 2022
Accepted manuscript online: 18 January 2023
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PACS:
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71.20.Eh
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(Rare earth metals and alloys)
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71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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79.60.-i
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(Photoemission and photoelectron spectra)
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71.45.Lr
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(Charge-density-wave systems)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12122409, 11874330, 11904334, 12004349, and 11904335), the National Key Research and Development Program of China (Grants Nos. 2022YFA1402201 and 2021YFA1601100), and the BL03U and BL09U ARPES beam line of Shanghai Synchrotron Radiation Facility (SSRF, China). |
Corresponding Authors:
Yun Zhang, Qiuyun Chen
E-mail: thu_zhangyun@126.com;sheqiuyun@126.com
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Cite this article:
Bo Wang(王博), Rui Zhou(周锐), Xuebing Luo(罗学兵), Yun Zhang(张云), and Qiuyun Chen(陈秋云) Electronic structure study of the charge-density-wave Kondo lattice CeTe3 2023 Chin. Phys. B 32 097103
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