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  • Title: Tuning the hybridization at the surface of a heavy-fermion system.
    Author: Vyalikh DV, Danzenbächer S, Kucherenko Y, Krellner C, Geibel C, Laubschat C, Shi M, Patthey L, Follath R, Molodtsov SL.
    Journal: Phys Rev Lett; 2009 Sep 25; 103(13):137601. PubMed ID: 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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