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Updated: Jun 18, 2026

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
Tuning the hybridization at the surface of a heavy-fermion system
D V Vyalikh1, S Danzenbächer, Yu Kucherenko
1Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany. vyalikh@physik.phy.tu-dresden.de
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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