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Fermi surface variation of Ce 4f-electrons in hybridization controlled heavy-fermion systems

Title
Fermi surface variation of Ce 4f-electrons in hybridization controlled heavy-fermion systems
Authors
Im, H. J.Ito, T.Miyazaki, H.Kimura, S.Kwon, Y. S.Saitoh, Y.Fujimori, S. -I.Yasui, A.Yamagami, H.
DGIST Authors
Kwon, Y. S.
Issue Date
2015-05
Citation
Solid State Communications, 209, 45-48
Type
Article
Article Type
Article
Keywords
A. Strongly Correlated Electrons SystemsAngle-Resolved Photoemission SpectroscopyC. Electronic StructureConduction ElectronsD. Ce 4F-Fermi SurfaceE. Angle-Resolved Photoemission SpectroscopyElectronic StructureFermi SurfaceFermi Surface TopologyHeavy Fermion SystemsPhotoelectron SpectroscopyResonant AngleStrong Correlation EffectStrongly Correlated ElectronsSurface Variations
ISSN
0038-1098
Abstract
Ce 3d-4f resonant angle-resolved photoemission measurements on CeCoGe1.2 Si0.8 and CeCoSi2 have been performed to understand the Fermi surface topology as a function of hybridization strength between Ce 4f- and conduction electrons in heavy-fermion systems. We directly observe that the hole-like Ce 4f-Fermi surfaces of CeCoSi2 is smaller than that of CeCoGe1.2 Si0.8, indicating the evolution of the Ce 4f-Fermi surface with the increase of the hybridization strength. In comparison with LDA calculation, the Fermi surface variation cannot be understood even though the overall electronic structure is roughly explained, indicating the importance of strong correlation effects. © 2015 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5191
DOI
10.1016/j.ssc.2015.03.005
Publisher
Elsevier Ltd
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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