Dresden 2026 – scientific programme
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O: Fachverband Oberflächenphysik
O 86: Surface dynamics
O 86.8: Talk
Thursday, March 12, 2026, 17:00–17:15, HSZ/0403
Surface resonant Raman scattering from coinage metal surfaces — •Mohamed Yassine Fatihi1, Sandhya Chandola2, 3, Norbert Esser2, 3, and Simone Sanna1 — 1Institut für Theoretische Physik and Center for Materials Research (LaMa), Justus-Liebig-Universität Gießen, 35392 Gießen, Germany — 2Helmholtz Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany — 3Institut für Festkörperphysik, TU Berlin, 10623 Berlin, Germany
The vibrational characterization of clean metal surfaces has remained largely inaccessible to optical spectroscopy, as Raman scattering from pristine metals is extremely weak and dominated by bulk phonon backgrounds. However, the first direct Raman observation of surface phonons on a Cu(110) single crystal has been recently reported[1]. We explain this Raman activity and predict it for the related Ag(110) surface from first principles, demonstrating by means of atomistic models how tuning the incident photon energy to the surface-state transition induces a striking resonant enhancement of the surface phonon signal. This mechanism selectively amplifies the surface response with respect to the bulk contribution. Our resonant surface phonon Raman approach establishes a powerful probe for investigating surface vibrational dynamics and electron-phonon interactions, creating new opportunities for real-time studies of metallic surfaces under diverse conditions, from ultra-high vacuum to catalytic and electrochemical environments
[1] Denk, M., et al. Phys. Rev. Lett. 128, 216101 (2022).
Keywords: Metals; DFT; Resonant enhancement; Lattice dynamics; Surface phonons