Tuning the hybridization at the surface of a heavy-fermion system.
Phys Rev Lett
; 103(13): 137601, 2009 Sep 25.
Article
em En
| MEDLINE
| ID: mdl-19905540
ABSTRACT
Electron-hybridization phenomena in YbRh_{2}Si_{2} were probed by angle-resolved photoemission. It was shown that the Yb 4f-Rh 4d hybridization strength in the surface region of this heavy-fermion material can be varied by deposition of Ag. Site-specific charge transfer from adatoms leads to change of the energy overlap of the interacting states close to the Fermi energy. Our study demonstrates a new way to tune the hybridization between 4f and valence electrons as well as the induced strong correlation effects at the surface of heavy-fermion systems.
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MEDLINE
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En
Ano de publicação:
2009
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Article