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Phys. Rev. Lett. 102, 026403 (2009) [4 pages]

Hybridization Phenomena in Nearly-Half-Filled f-Shell Electron Systems: Photoemission Study of EuNi2P2

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S. Danzenbächer1, D. V. Vyalikh1, Yu. Kucherenko1,2, A. Kade1, C. Laubschat1, N. Caroca-Canales3, C. Krellner3, C. Geibel3, A. V. Fedorov4, D. S. Dessau5, R. Follath6, W. Eberhardt6, and S. L. Molodtsov1
1Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany
2Institute for Metal Physics, National Academy of Sciences of Ukraine, UA-03142 Kiev, Ukraine
3Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, D-01187 Dresden, Germany
4Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
5Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
6BESSY GmbH, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany

Received 9 July 2008; published 14 January 2009

The mixed-valent compound EuNi2P2 was studied by photoemission. Observed splittings and dispersions of the Eu 4f6 final state close to energy crossings of the Eu 4f and Ni 3d states are explained in terms of hybridization by a momentum and energy dependence of the electron hopping matrix element. These data obtained for a system with more than one 4f electron (hole) show that dispersions and hybridization gaps related to Kondo and heavy-fermion behavior can be found in other rare-earth-metal compounds apart from Ce and Yb-based ones.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.026403
DOI:
10.1103/PhysRevLett.102.026403
PACS:
71.27.+a, 71.20.Eh, 75.30.Mb, 79.60.-i
 
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