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  Evolution of the Kondo lattice and non-Fermi liquid excitations in a heavy-fermion metal

Seiro, S., Jiao, L., Kirchner, S., Hartmann, S., Friedemann, S., Krellner, C., et al. (2018). Evolution of the Kondo lattice and non-Fermi liquid excitations in a heavy-fermion metal. Nature Communications, 9(1): 3324, pp. 1-7. doi:10.1038/s41467-018-05801-5.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-F33C-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-F33F-7
Genre: Journal Article

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 Creators:
Seiro, S.1, Author              
Jiao, L.2, Author              
Kirchner, S.3, Author
Hartmann, S.3, Author
Friedemann, S.3, Author
Krellner, C.3, Author
Geibel, C.4, Author              
Si, Q.3, Author
Steglich, F.5, Author              
Wirth, S.6, Author              
Affiliations:
1Silvia Seiro, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863473              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3External Organizations, ou_persistent22              
4Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
5Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              
6Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863460              

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 Abstract: Strong electron correlations can give rise to extraordinary properties of metals with renormalized Landau quasiparticles. Near a quantum critical point, these quasiparticles can be destroyed and non-Fermi liquid behavior ensues. YbRh2Si2 is a prototypical correlated metal exhibiting the formation of quasiparticle and Kondo lattice coherence, as well as quasiparticle destruction at a field-induced quantum critical point. Here we show how, upon lowering the temperature, Kondo lattice coherence develops at zero field and finally gives way to non-Fermi liquid electronic excitations. By measuring the single-particle excitations through scanning tunneling spectroscopy, we find the Kondo lattice peak displays a non-trivial temperature dependence with a strong increase around 3.3 K. At 0.3 K and with applied magnetic field, the width of this peak is minimized in the quantum critical regime. Our results demonstrate that the lattice Kondo correlations have to be sufficiently developed before quantum criticality can set in.

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Language(s): eng - English
 Dates: 2018-08-202018-08-20
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1038/s41467-018-05801-5
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Affiliations:
Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 9 (1) Sequence Number: 3324 Start / End Page: 1 - 7 Identifier: ISSN: 2041-1723
CoNE: /journals/resource/2041-1723