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  Large Fermi surface expansion through anisotropic mixing of conduction and f electrons in the semimetallic Kondo lattice CeBi

Li, P., Wu, Z., Wu, F., Guo, C., Liu, Y., Liu, H., et al. (2019). Large Fermi surface expansion through anisotropic mixing of conduction and f electrons in the semimetallic Kondo lattice CeBi. Physical Review B, 100(15): 155110, pp. 1-8. doi:10.1103/PhysRevB.100.155110.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-FB15-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-FB16-8
Genre: Journal Article

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 Creators:
Li, Peng1, Author
Wu, Zhongzheng1, Author
Wu, Fan1, Author
Guo, Chunyu1, Author
Liu, Yi1, Author
Liu, Haijiang1, Author
Sun, Zhe1, Author
Shi, Ming1, Author
Rodolakis, Fanny1, Author
McChesney, Jessica L.1, Author
Cao, Chao1, Author
Yuan, Huiqiu1, Author
Steglich, Frank1, Author              
Liu, Yang1, Author
Affiliations:
1External Organizations, ou_persistent22              

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Free keywords: MONOPNICTIDES; RESISTIVITY; TRANSITION; ITINERANT; VALENCEMaterials Science; Physics;
 Abstract: Using angle-resolved photoemission spectroscopy (ARPES) and resonant ARPES, we report evidence of strong anisotropic conduction-f electron mixing (c-f mixing) in CeBi by observing a largely expanded Ce 5d pocket at low temperature, with no change in the Bi 6p bands. The anisotropic Fermi surface (FS) expansion is accompanied by a pronounced spectral weight transfer from the local 4f(0) peak of Ce (corresponding to Ce3+) to the itinerant conduction bands near the Fermi level. Careful analysis suggests that the observed large FS change (with a volume expansion of the electron pocket up to 40%) can most naturally be explained by a small valence change (similar to 1%) of Ce, which coexists with a very weak Kondo screening. Our work therefore provides evidence for a FS change driven by real charge fluctuations deep in the Kondo limit, which is highly dependent on the orbital character and momentum and is made possible by the low carrier density.

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Language(s): eng - English
 Dates: 2019-10-072019-10-07
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.100.155110
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 100 (15) Sequence Number: 155110 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008