ARPES view on surface and bulk hybridization phenomena in the antiferromagnetic Kondo lattice CeRh2Si2.

Autor: Patil S; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.; Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India., Generalov A; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.; Max IV Laboratory, Lund University, Box 118, 22100 Lund, Sweden., Güttler M; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.; CSNSM, Université Paris-Sud and CNRS/IN2P3, Batiments 104 et 108, 91405 Orsay, France., Kushwaha P; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden, Germany., Chikina A; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany., Kummer K; European Synchrotron Radiation Facility, 71, Avenue des Martyrs, Grenoble 38000, France., Rödel TC; CSNSM, Université Paris-Sud and CNRS/IN2P3, Batiments 104 et 108, 91405 Orsay, France., Santander-Syro AF; CSNSM, Université Paris-Sud and CNRS/IN2P3, Batiments 104 et 108, 91405 Orsay, France., Caroca-Canales N; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden, Germany., Geibel C; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden, Germany., Danzenbächer S; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany., Kucherenko Y; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.; Institute for Metal Physics, National Academy of Sciences of Ukraine, Vernadsky blvd. 36, UA-03142 Kiev, Ukraine., Laubschat C; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany., Allen JW; Randall Laboratory, University of Michigan, 450 Church St, Ann Arbor, Michigan 48109-1040, USA., Vyalikh DV; Institute of Solid State Physics, Dresden University of Technology, Zellescher Weg 16, D-01062 Dresden, Germany.; Saint Petersburg State University, Saint Petersburg 198504, Russia.; Donostia International Physics Center (DIPC), Departamento de Fisica de Materiales and CFM-MPC UPV/EHU, 20080 San Sebastian, Spain.; IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2016 Mar 18; Vol. 7, pp. 11029. Date of Electronic Publication: 2016 Mar 18.
DOI: 10.1038/ncomms11029
Abstrakt: The hybridization between localized 4f electrons and itinerant electrons in rare-earth-based materials gives rise to their exotic properties like valence fluctuations, Kondo behaviour, heavy-fermions, or unconventional superconductivity. Here we present an angle-resolved photoemission spectroscopy (ARPES) study of the Kondo lattice antiferromagnet CeRh2Si2, where the surface and bulk Ce-4f spectral responses were clearly resolved. The pronounced 4f (0) peak seen for the Ce terminated surface gets strongly suppressed in the bulk Ce-4f spectra taken from a Si-terminated crystal due to much larger f-d hybridization. Most interestingly, the bulk Ce-4f spectra reveal a fine structure near the Fermi edge reflecting the crystal electric field splitting of the bulk magnetic 4f (1)5/2 state. This structure presents a clear dispersion upon crossing valence states, providing direct evidence of f-d hybridization. Our findings give precise insight into f-d hybridization penomena and highlight their importance in the antiferromagnetic phases of Kondo lattices.
Databáze: MEDLINE