ÖPG-CMD Joint Meeting 2026

Adsorption-induced modification of the surface resonant vibrational response on Cu(110)

Sep 24, 2026, 4:45 PM

15m

HS 12.01 (University of Graz)

3) Contributed talk OGD: Surfaces, Interfaces and Thin Films Parallel

Speaker

Sarang Bhasme (Surface Science Division, Institute of Experimental Physics, Johannes Kepler University)

Description

Surface Resonant Raman Scattering (SRRS) is used to probe surface phonons of Cu(110) via resonant coupling to surface electronic states [1]. In combination with Reflectance Difference Spectroscopy (RDS), we investigate adsorption-induced modification of the vibrational response under ultra-high vacuum conditions. Time resolved measurements during controlled CO and $O_2$ exposure reveal systematic changes in surface phonon-related features, indicating a modification of the surface electronic resonance condition upon adsorption. Based on this sensitivity, we extend SRRS to molecular adsorbates. First test measurements on Dihydrotetraazapentacene (DHTAP) on Cu(110) demonstrate the feasibility of detecting molecular vibrational signals under resonant conditions. These results establish SRRS as a sensitive probe of adsorption-induced changes on metal surfaces and provide a route towards studying more complex molecule-surface systems.

[1] M. Denk et al., Phys. Rev. Lett. 128, 216101 (2022).