Spin-orbit splitting of the Shockley surface state on Cu(111)

A. Tamai, W. Meevasana, P. D. C. King, C. W. Nicholson, A. de la Torre, E. Rozbicki, F. Baumberger

Abstract

We present angle-resolved photoemission data from Cu(111). Using a focused 6 eV continuous-wave laser for photoexcitation, we achieve a high effective momentum resolution, enabling detection of the Rashba spin splitting in the Shockley surface state on Cu(111). The magnitude of the spin splitting of $\ensuremath{\Delta}k\ensuremath{\sim}0.006$ \AA{}${}^{\ensuremath{-}1}$ is surprisingly large and exceeds values predicted for the analogous surface state on Ag(111), but is reproduced by first-principles calculations. We further resolve a kink in the dispersion, which we attribute to electron-phonon coupling.

Locations

• arXiv (Cornell University) - View - PDF
• DataCite API - View
• Physical Review B - View