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Unexpected differen...
Unexpected differences between surface and bulk spectroscopic and implied Kondo properties of heavy fermion CeRh2Si2
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- Poelchen, Georg (författare)
- Dresden University of Technology,European Synchrotron Radiation Facility
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- Schulz, Susanne (författare)
- Dresden University of Technology
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- Mende, Max (författare)
- Dresden University of Technology
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- Güttler, Monika (författare)
- Dresden University of Technology
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- Generalov, Alexander (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Fedorov, Alexander V. (författare)
- Leibniz Institute for Solid State and Materials Research
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- Caroca-Canales, Nubia (författare)
- Max Planck Institute for Chemical Physics of Solids
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- Geibel, Christoph (författare)
- Max Planck Institute for Chemical Physics of Solids
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- Kliemt, Kristin (författare)
- Goethe University
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- Krellner, Cornelius (författare)
- Goethe University
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- Danzenbächer, Steffen (författare)
- Dresden University of Technology
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- Usachov, Dmitry Yu (författare)
- Saint Petersburg State University
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- Dudin, Pavel (författare)
- Diamond Light Source,Synchrotron SOLEIL
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- Antonov, Victor N. (författare)
- G.V. Kurdyumov Institute for Metal Physics of National Academy of Sciences of Ukraine
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- Allen, James W. (författare)
- University of Michigan
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- Laubschat, Clemens (författare)
- Dresden University of Technology
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- Kummer, Kurt (författare)
- European Synchrotron Radiation Facility
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- Kucherenko, Yuri (författare)
- G.V. Kurdyumov Institute for Metal Physics of National Academy of Sciences of Ukraine
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- Vyalikh, Denis V. (författare)
- Basque Foundation for Science,Donostia International Physics Center (DIPC)
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(creator_code:org_t)
- 2020-10-06
- 2020
- Engelska.
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Ingår i: npj Quantum Materials. - : Springer Science and Business Media LLC. - 2397-4648. ; 5:1
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://www.nature.c...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Ultra-violet angle-resolved photoemission spectroscopy (UV-ARPES) was used to explore the temperature dependence of the Ce-4f spectral responses for surface and bulk in the antiferromagnetic Kondo lattice CeRh2Si2. Spectra were taken from Ce- and Si-terminated surfaces in a wide temperature range, and reveal characteristic 4f patterns for weakly (surface) and strongly (bulk) hybridized Ce, respectively. The temperature dependence of the Fermi level peak differs strongly for both cases implying that the effective Kondo temperature at the surface and bulk can be rather distinct. The greatly reduced crystal–electric-field (CEF) splitting at the surface gives reason to believe that the surface may exhibit a larger effective Kondo temperature because of a higher local-moment effective degeneracy. Further, the hybridization processes could strongly affect the 4f peak intensity at the Fermi level. We derived the k-resolved dispersion of the Kondo peak which is also found to be distinct due to different sets of itinerant bands to which the 4f states of surface and bulk Ce are coupled. Overall our study brings into reach the ultimate goal of quantitatively testing many-body theories that link spectroscopy and transport properties, for both the bulk and the surface, separately. It also allows for a direct insight into the broader problem of Kondo lattices with two different local-moment sublattices, providing some understanding of why the cross-talking between the two Kondo effects is weak.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Poelchen, Georg
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Schulz, Susanne
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Mende, Max
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Güttler, Monika
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Generalov, Alexa ...
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Fedorov, Alexand ...
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visa fler...
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Caroca-Canales, ...
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Geibel, Christop ...
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Kliemt, Kristin
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Krellner, Cornel ...
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Danzenbächer, St ...
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Usachov, Dmitry ...
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Dudin, Pavel
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Antonov, Victor ...
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Allen, James W.
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Laubschat, Cleme ...
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Kummer, Kurt
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Kucherenko, Yuri
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Vyalikh, Denis V ...
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