by Dallera, C, Grioni, M, Palenzona, A, Taguchi, M, Annese, E, Ghiringhelli, G, Tagliaferri, A, Brookes, NB, Neisius, T and Braicovich, L
Abstract:
We performed bulk-sensitive x-ray absorption (XAS) in the partial fluorescence yield (PFY) mode, and resonant x-ray emission (RXES) measurements of the solid solution Sc (7 at.%):Ce at the Ce L-3 (2p–>5d) and M-4,M-5 (3d–>4f) absorption edges. We deduce an increasing 4f-band hybridization from the gamma-phase stable at room temperature to the low-temperature alpha-Ce, consistent with the “Kondo collapse” scenario for the transition. The enhanced intrinsic resolution of PFY-XAS allows us to resolve the elusive three-peak structure predicted by theory. Thanks to the selective enhancement typical of RXES, we could estimate the small but non-negligible contribution of the f(2) configuration in the hybrid ground state, and its change in the two phases. The linear dichroism effect in the M-4,M-5 RXES spectra is consistent with the observed hybridization of 4f and conduction states.
Reference:
alpha-gamma transition in metallic Ce studied by resonant x-ray spectroscopies (Dallera, C, Grioni, M, Palenzona, A, Taguchi, M, Annese, E, Ghiringhelli, G, Tagliaferri, A, Brookes, NB, Neisius, T and Braicovich, L), In PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, volume 70, 2004.
Bibtex Entry:
@article{ ISI:000223716700034, Author = {Dallera, C and Grioni, M and Palenzona, A and Taguchi, M and Annese, E and Ghiringhelli, G and Tagliaferri, A and Brookes, NB and Neisius, T and Braicovich, L}, Title = {{alpha-gamma transition in metallic Ce studied by resonant x-ray spectroscopies}}, Journal = {{PHYSICAL REVIEW B}}, Year = {{2004}}, Volume = {{70}}, Number = {{8}}, Month = {{AUG}}, Abstract = {{We performed bulk-sensitive x-ray absorption (XAS) in the partial fluorescence yield (PFY) mode, and resonant x-ray emission (RXES) measurements of the solid solution Sc (7 at.%):Ce at the Ce L-3 (2p-->5d) and M-4,M-5 (3d-->4f) absorption edges. We deduce an increasing 4f-band hybridization from the gamma-phase stable at room temperature to the low-temperature alpha-Ce, consistent with the ``Kondo collapse{''} scenario for the transition. The enhanced intrinsic resolution of PFY-XAS allows us to resolve the elusive three-peak structure predicted by theory. Thanks to the selective enhancement typical of RXES, we could estimate the small but non-negligible contribution of the f(2) configuration in the hybrid ground state, and its change in the two phases. The linear dichroism effect in the M-4,M-5 RXES spectra is consistent with the observed hybridization of 4f and conduction states.}}, Publisher = {{AMERICAN PHYSICAL SOC}}, Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}}, Type = {{Article}}, Language = {{English}}, Affiliation = {{Dallera, C (Corresponding Author), Politecn Milan, Dipartimento Fis, INFM, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy. Politecn Milan, Dipartimento Fis, INFM, I-20133 Milan, Italy. Ecole Polytech Fed Lausanne, IPN, CH-1015 Lausanne, Switzerland. Univ Genoa, INFM, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy. Spring 8, RIKEN, Mikazuki, Hyogo 6795148, Japan. Univ Modena & Reggio Emilia, Dipartimento Fis, INFM, I-41100 Modena, Italy. European Synchrotron Radiat Facil, F-38043 Grenoble, France.}}, DOI = {{10.1103/PhysRevB.70.085112}}, Article-Number = {{085112}}, ISSN = {{1098-0121}}, Keywords-Plus = {{EMISSION-SPECTROSCOPY; ELECTRONIC-STRUCTURE; POLARIZATION DEPENDENCE; STATE PROPERTIES; GROUND-STATE; CERIUM; PHOTOEMISSION; SCATTERING; SPECTRA; SYSTEMS}}, Research-Areas = {{Materials Science; Physics}}, Web-of-Science-Categories = {{Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter}}, ResearcherID-Numbers = {{Annese, Emilia/AAM-3070-2020 Brookes, Nicholas B/C-6718-2019 Ghiringhelli, Giacomo/D-1159-2014 Tagliaferri, Alberto/L-2903-2015 }}, ORCID-Numbers = {{Brookes, Nicholas B/0000-0002-1342-9530 Ghiringhelli, Giacomo/0000-0003-0867-7748 Tagliaferri, Alberto/0000-0001-8001-1786 Braicovich, Lucio/0000-0001-6548-9140 Annese, Emilia/0000-0002-4066-697X}}, Number-of-Cited-References = {{46}}, Times-Cited = {{37}}, Usage-Count-Last-180-days = {{1}}, Usage-Count-Since-2013 = {{18}}, Journal-ISO = {{Phys. Rev. B}}, Doc-Delivery-Number = {{851WH}}, Unique-ID = {{ISI:000223716700034}}, DA = {{2020-12-22}}, }
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