Tuning the hybridization at the surface of a heavy-fermion system.
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.
Vyalikh
D V
DV
Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany. vyalikh@physik.phy.tu-dresden.de
Danzenbächer
S
S
Kucherenko
Yu
Y
Krellner
C
C
Geibel
C
C
Laubschat
C
C
Shi
M
M
Patthey
L
L
Follath
R
R
Molodtsov
S L
SL