Role of elastic scattering in electron dynamics at ordered alkali overlayers on Cu(111)

C. Corriol, V. M. Silkin, D. Sánchez-Portal, A. Arnau, E. V. Chulkov, P. M. Echenique, T. Von Hofe, J. Kliewer, J. Kröger, R. Berndt

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Abstract

Scanning tunneling spectroscopy of p(2×2) Cs and Na ordered overlayers on Cu(111) reveals similar line widths of quasi-two-dimensional quantum well states despite largely different binding energies. Detailed calculations show that 50% of the line widths are due to electron-phonon scattering while inelastic electron-electron scattering is negligible. The mechanism of enhanced elastic scattering due to Brillouin zone backfolding contributes the remaining width.

Original languageEnglish (US)
Article number176802
JournalPhysical Review Letters
Volume95
Issue number17
DOIs
StatePublished - Oct 21 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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