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Soft X-ray synchrotron radiation spectroscopy study of rare-earth chalcogenide charge-density wave compounds

Title
Soft X-ray synchrotron radiation spectroscopy study of rare-earth chalcogenide charge-density wave compounds
Authors
Lee, EunsookKim, Hyun WooSeong, SeunghoDenlinger, J. D.Kwon, Yong SeungKang, J. -S.
DGIST Authors
Kwon, Yong Seung
Issue Date
2017-02
Citation
Journal of the Korean Physical Society, 70(4), 389-393
Type
Article
Article Type
Article
Keywords
AbsorptionARPESCeTe2Charge Density Wave (CDW)Electronic StructureElectronic StructureFermi SurfaceTransition Metal CompoundsXas
ISSN
0374-4884
Abstract
The electronic structures of the layered rare-earth chalcogenide compounds of CeTe2, PrTe2, and PrTe3, which have the charge-density wave (CDW) transition and possibly the chiral transition, have been investigated by employing soft X-ray absorption spectroscopy (XAS) and angle-resolved photoemission spectroscopy (ARPES). R 3d XAS measurements show that the valence states of Ce and Pr ions are nearly trivalent in all the compounds. Similar band dispersions are observed in their measured ARPES data, but with the band positions in PrTe3 being shifted up in energy compared to those in CeTe2 and PrTe2. These findings suggest that their Te 5p band structures are determined mainly by the 2D interactions in the Te(2)/Te(3) sheets, but with a larger number of holes in the Te 5p bands in PrTe3 than in CeTe2 and PrTe2. The measured constant energy maps of CeTe2, PrTe2, and PrTe3 for high binding energies are similar to one another, reflecting the Te 5p band structures of the Te(2)/Te(3) square nets. In contrast, the Fermi surfaces (FSs) of CeTe2 and PrTe3 exhibit extra features, different from the FS of the ideal Te(2)/Te(3) square nets, which arise from the CDW-induced FS reconstruction in the Te(2)/Te(3) sheets. © 2017, The Korean Physical Society.
URI
http://hdl.handle.net/20.500.11750/5019
DOI
10.3938/jkps.70.389
Publisher
The Korean Physical Society
Related Researcher
  • Author Kwon, Yong Seung Quantum Functional Materials Laboratory
  • Research Interests High Tc Superconductors and magnetic materials; Thermoelectric Materials
Files:
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Collection:
Department of Emerging Materials ScienceQuantum Functional Materials Laboratory1. Journal Articles


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