Název: | Photoemission signature of momentum-dependent hybridization in CeCoIn5 |
Autoři: | Kurleto, R. Fidrysiak, M. Nicolai, Laurent Christophe Minár, Jan Rosmus, M. Walczak, Ł. Tejeda, A. Rault, J.E. Bertran, F. Kądzielawa, A.P. Legut, D. Gnida, D. Kaczorowski, D. Kissner, K. Reinert, F. Spałek, J. Starowicz, P. |
Citace zdrojového dokumentu: | KURLETO, R. FIDRYSIAK, M. NICOLAI, LCH. MINÁR, J. ROSMUS, M. WALCZAK, Ł. TEJEDA, A. RAULT, J. BERTRAN, F. KĄDZIELAWA, A. LEGUT, D. GNIDA, D. KACZOROWSKI, D. KISSNER, K. REINERT, F. SPAŁEK, J. STAROWICZ, P. Photoemission signature of momentum-dependent hybridization in CeCoIn5. Physical Review B, 2021, roč. 104, č. 12, s. nestránkováno. ISSN: 2469-9950 |
Datum vydání: | 2021 |
Nakladatel: | American Physical Society |
Typ dokumentu: | postprint article |
URI: | 2-s2.0-85114643408 http://hdl.handle.net/11025/51443 |
ISSN: | 2469-9950 |
Klíčová slova v dalším jazyce: | hybridization;f electrons, photoemission, resonant ARPES;Tight Binding model;multiple scattering KKR |
Abstrakt v dalším jazyce: | Hybridization between f electrons and conduction bands (c-f hybridization) is a driving force for many unusual phenomena. To provide insight into it, systematic studies of CeCoIn 5 heavy fermion superconductor have been performed by angle-resolved photoemission spectroscopy (ARPES) in a large angular range at temperature of T = 6 K. The used photon energy of 122 eV corresponds to Ce 4d-4f resonance. Calculations carried out with the relativistic multiple scattering Korringa-Kohn-Rostoker method and one-step model of photoemission yielded realistic simulation of the ARPES spectra, indicating that Ce-In surface termination prevails. Surface states, which have been identified in the calculations, contribute significantly to the spectra. Effects of the hybridization strongly depend on wave vector. They include a dispersion of heavy electrons and bands gaining f-electron character when approaching Fermi energy. We have also observed a considerable variation of f-electron spectral weight at EF , which is normally determined by both matrix element effects and wave vector dependent c-f hybridization. Fermi surface scans covering a few Brillouin zones revealed large matrix element effects. A symmetrization of experimental Fermi surface, which reduces matrix element contribution, yielded a specific variation of 4f-electron enhanced spectral intensity at EF around Gamma barre and M barre points. Tight-binding approximation calculations for Ce-In plane provided the same universal distribution of 4f-electron density for a range of values of the parameters used in the model. |
Práva: | © American Physical Society. |
Vyskytuje se v kolekcích: | Články / Articles (RAM) OBD |
Soubory připojené k záznamu:
Soubor | Velikost | Formát | |
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NICOLAI_2101.05761.pdf | 9,26 MB | Adobe PDF | Zobrazit/otevřít |
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http://hdl.handle.net/11025/51443
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