Electron properties and surface effects of rare-earth systems
Identifieur interne : 002B12 ( Main/Curation ); précédent : 002B11; suivant : 002B13Electron properties and surface effects of rare-earth systems
Auteurs : C. Laubschat [Allemagne]Source :
- Applied physics. A, Materials science & processing
Descripteurs français
- Pascal (Inist)
- Etat électronique surface, Structure électronique, Hybridation, Valence, Composé valence mixte, Modèle itinérant, Spectrométrie photoélectron, Photoémission inverse, Niveau coeur, Etat multiplet, Effet Fano, Délocalisation électronique, Couche mince, Terbium, Thulium, Etude expérimentale, 7320A, 7960D.
- Wicri :
- geographic : Valence (Drôme).
English descriptors
- KwdEn :
Abstract
Recent experimental results concerning the surface-related electronic structure of rare-earth solids are presented. Special attention is paid to the occurrence of surface-valence transitions in trivalent or mixed-valent compounds of Sm, Eu, Tm, and Yb that are due to energetically lowering of unoccupied 4f-states caused by the reduced atomic coordination at the surface. Similar phenomena are encountered in Ce-systems leading to a decrease of 4f-hybridization in the outermost atomic surface layer. The importance of this phenomenon for the correct interpretation of electron-spectroscopic data of Ce-systems is discussed. Experimental evidence for transitions from a localized to an itinerant behavior of the 4f-states is obtained for CeRh3.
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Pascal:98-0046699Le document en format XML
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<author><name sortKey="Laubschat, C" sort="Laubschat, C" uniqKey="Laubschat C" first="C." last="Laubschat">C. Laubschat</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut für Oberflächenphysik und Mikrostrukturphysik, TU Dresden</s1>
<s2>01062 Dresden</s2>
<s3>DEU</s3>
<sZ>1 aut.</sZ>
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<country>Allemagne</country>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Electron properties and surface effects of rare-earth systems</title>
<author><name sortKey="Laubschat, C" sort="Laubschat, C" uniqKey="Laubschat C" first="C." last="Laubschat">C. Laubschat</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut für Oberflächenphysik und Mikrostrukturphysik, TU Dresden</s1>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Core levels</term>
<term>Electron delocalization</term>
<term>Electronic structure</term>
<term>Experimental study</term>
<term>Fano effect</term>
<term>Hybridization</term>
<term>Inverse photoemission</term>
<term>Itinerant model</term>
<term>Mixed-valence compounds</term>
<term>Multiplet state</term>
<term>Photoelectron spectroscopy</term>
<term>Surface electron state</term>
<term>Terbium</term>
<term>Thin films</term>
<term>Thulium</term>
<term>Valence</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Etat électronique surface</term>
<term>Structure électronique</term>
<term>Hybridation</term>
<term>Valence</term>
<term>Composé valence mixte</term>
<term>Modèle itinérant</term>
<term>Spectrométrie photoélectron</term>
<term>Photoémission inverse</term>
<term>Niveau coeur</term>
<term>Etat multiplet</term>
<term>Effet Fano</term>
<term>Délocalisation électronique</term>
<term>Couche mince</term>
<term>Terbium</term>
<term>Thulium</term>
<term>Etude expérimentale</term>
<term>7320A</term>
<term>7960D</term>
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<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Valence (Drôme)</term>
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<front><div type="abstract" xml:lang="en">Recent experimental results concerning the surface-related electronic structure of rare-earth solids are presented. Special attention is paid to the occurrence of surface-valence transitions in trivalent or mixed-valent compounds of Sm, Eu, Tm, and Yb that are due to energetically lowering of unoccupied 4f-states caused by the reduced atomic coordination at the surface. Similar phenomena are encountered in Ce-systems leading to a decrease of 4f-hybridization in the outermost atomic surface layer. The importance of this phenomenon for the correct interpretation of electron-spectroscopic data of Ce-systems is discussed. Experimental evidence for transitions from a localized to an itinerant behavior of the 4f-states is obtained for CeRh<sub>3</sub>
.</div>
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