Author/Authors :
Shen، نويسنده , , X.J. and Kwak، نويسنده , , H. and Radojevic، نويسنده , , A.M. and Smadici، نويسنده , , S. and Mocuta، نويسنده , , D. and Osgood Jr.، نويسنده , , R.M.، نويسنده ,
Abstract :
The lifetime of n=1 image-state electrons on stepped on Cu(7 7 5) has been measured as a function of their translational momentum, k∥. At the terrace normal this lifetime is equal to that for flat Cu(1 1 1), i.e. τ=18±2 fs. For motion parallel to the step orientation, the lifetime decreases symmetrically about k∥=0 and the absolute values are in close agreement with that predicted by a recent many-body theory. Contrasting data for motion perpendicular to the step edges is also presented.
