A. Tamai, W. Meevasana, P. D. C. King, C. Nicholson, A. de la Torre, E. Rozbicki, F. Baumberger
We present angle-resolved photoemission data from Cu(111). Using a focused 6 eV continuous wave laser for photo-excitation, we achieve a high effective momentum resolution enabling the first detection of the Rashba spin splitting in the Shockley surface state on Cu(111). The magnitude of the spin-splitting of Delta k ~ 0.006 A^-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.
View original:
http://arxiv.org/abs/1301.5991
No comments:
Post a Comment