Revisiting the low temperature electron-phonon relaxation of noble metals

Abstract

The low temperature electron-phonon (e-ph) relaxation near the surface of noble metals, Cu and Ag, is studied by using the density-functional theory approach. The appearance of the surface phonon mode can give rise to a strong enhancement of the Eliashberg function at low frequency $\omega$. Assuming the Eliashberg function proportional to the square of $\omega$ in the low frequency limit, the e-ph relaxation time obtained from the surface calculations is shorter than that from the bulk calculation. The calculated e-ph relaxation time for the former is in agreement with a recent experiment for thin films.

5 pages, 6 figures

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Cited by in corpus (2)

• Energy relaxation and electron-phonon coupling in laser-excited metals
• Evidence of the disorder-independent electron-phonon scattering time in thin NbN films