Photoemission study of carriers and Ce 4f spectral weight in CeTe2
Photoemission study of carriers and Ce 4f spectral weight in CeTe2
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DOI：
10.1088/0953-8984/16/50/007
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发表时间：
2004-12
期刊：
影响因子：
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通讯作者：
J. Kang;C. G. Olson;Y. Kwon;S. W. Han;K. Kim;A. Sekiyama;S. Kasai;S. Suga;B. Min
中科院分区：
文献类型：
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作者：
J. Kang;C. G. Olson;Y. Kwon;S. W. Han;K. Kim;A. Sekiyama;S. Kasai;S. Suga;B. Min
利用高分辨率光电发射光谱（PES）对高质量CeTe2单晶的电子结构进行了研究。Ce三维XAS测量表明，Ce离子是三价的。Ce 4f能谱显示双峰结构，Ce 4f体杂化峰位于EF以下0.8 eV左右。对CeTe2的高分辨率、高能量、体积敏感的PES研究提供了在EF附近的金属态密度的证据。EF附近的载流子主要由ce5d和Te(1) 5p态组成，而ce4f和Te(2) 5p态的贡献可以忽略不计。这一发现与Te(1)薄片的CDW不稳定性一致。
The electronic structure of CeTe2 has been investigated by performing high-resolution photoemission spectroscopy (PES) measurements on high-quality stoichiometric single crystals of CeTe2. The Ce 3d XAS measurement indicates that the Ce ions are trivalent. The Ce 4f PES spectrum reveals two-peak structures with the Ce 4f bulk hybridization peak located around 0.8 eV below EF. The high-resolution, high-energy, bulk-sensitive PES study of CeTe2 provides evidence for a metallic density of states near EF. The carriers near EF consist mainly of Ce 5d and Te(1) 5p states, while the contribution from the Ce 4f and Te(2) 5p states is negligible. This finding agrees with the CDW instability in the Te(1) sheets.