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  Valence effect on the thermopower of Eu systems

Stockert, U., Seiro, S., Caroca-Canales, N., Hassinger, E., & Geibel, C. (2020). Valence effect on the thermopower of Eu systems. Physical Review B, 101(23): 235106, pp. 1-7. doi:10.1103/PhysRevB.101.235106.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-981B-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-981D-F
Genre: Journal Article

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 Creators:
Stockert, U.1, Author              
Seiro, S.2, Author              
Caroca-Canales, N.1, Author              
Hassinger, E.3, Author              
Geibel, C.4, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2Silvia Seiro, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863473              
3Physics of Unconventional Metals and Superconductors, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_2466700              
4Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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 Abstract: We investigated the thermoelectric transport properties of EuNi2P2 and EuIr2Si2 to evaluate the relevance of Kondo interaction and valence fluctuations in these materials. While the thermal conductivities behave conventionally, the thermopower curves exhibit large values with pronounced maxima as typically observed in Ce- and Yb-based heavy-fermion materials. However, neither the positions of these maxima nor the absolute thermopower values at low temperature are in line with the heavy-fermion scenario and the moderately enhanced effective charge carrier masses. Instead, we may relate the thermopower in our materials to the temperature-dependent Eu valence by taking into account changes in the chemical potential. Our analysis confirms that valence fluctuations play an important role in EuNi2P2 and EuIr2Si2.

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Language(s): eng - English
 Dates: 2020-06-012020-06-01
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.101.235106
 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: 101 (23) Sequence Number: 235106 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008