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  Insight into the temperature dependent properties of the ferromagnetic Kondo lattice YbNiSn

Generalov, A., Sokolov, D. A., Chikina, A., Kucherenko, Y., Antonov, V. N., Bekenov, L. V., et al. (2017). Insight into the temperature dependent properties of the ferromagnetic Kondo lattice YbNiSn. Physical Review B, 95(18): 184433, pp. 1-7. doi:10.1103/PhysRevB.95.184433.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C28C-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C43F-5
Genre: Journal Article

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 Creators:
Generalov, A.1, Author
Sokolov, D. A.2, Author              
Chikina, A.1, Author
Kucherenko, Yu.1, Author
Antonov, V. N.1, Author
Bekenov, L. V.1, Author
Patil, S.1, Author
Huxley, A. D.1, Author
Allen, J. W.1, Author
Matho, K.1, Author
Kummer, K.1, Author
Vyalikh, D. V.1, Author
Laubschat, C.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: Analyzing temperature dependent photoemission (PM) data of the ferromagnetic kondo-lattice (KL) system YbNiSn in the light of the periodic Anderson model (PAM) we show that the KL behavior is not limited to temperatures below a temperature (T) over bar (K), defined empirically from resistivity and specific heat measurements. As characteristic for weakly hybridized Ce and Yb systems, the PE spectra reveal a 4f -derived Fermi level peak, which reflects contributions from the Kondo resonance and its crystal electric field (CEF) satellites. In YbNiSn this peak has an unusual temperature dependence: With decreasing temperature a steady linear increase of intensity is observed which extends over a large interval ranging from 100 K down to 1 K without showing any peculiarities in the region of (T) over bar (K) similar to T-C = 5.6 K. In the light of the single-impurity Anderson model (SIAM) this intensity variation reflects a linear increase of 4f occupancy with decreasing temperature, indicating an onset of Kondo screening at temperatures above 100 K. Within the PAM this phenomenon could be described by a non-Fermi-liquid-like T - linear damping of the self-energy which accounts phenomenologically for the feedback from the closely spaced CEF states.

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Language(s): eng - English
 Dates: 2017-05-302017-05-30
 Publication Status: Published in print
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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: 95 (18) Sequence Number: 184433 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008