Helium spin-echo as a surface-sensitive probe of vibrational energy dissipation

Key Points

• The aim is to quantify linewidths and lifetimes of surface vibrational modes to understand energy dissipation.
• Utilized helium spin-echo spectroscopy to measure vibrational modes.
• Analyzed various surface interactions, including Rayleigh waves on Ag(001) and organic molecule vibrations.
• Successfully quantified linewidths and lifetimes of several vibrational modes.
• Provided direct insights into energy dissipation and coherence at interfaces.