We present high-resolution energy loss spectroscopy measurements on the dispersion and damping of collective electronic excitations in ultrathin Ag films grown on Cu(111) and Ni(111). For Ag/Cu(111) the surface plasmon was found to be confined within grains but confinement was removed by annealing. On the other hand, a purely quadratic dispersion was observed for the layer-by-layer Ag film deposited onto the Ni(111) surface. (c) 2008 Elsevier Ltd. All rights reserved.
Dispersion and damping of surface plasmon in Ag thin films grown on Cu(111) and Ni(111)
FORMOSO, Vincenzo;CHIARELLO, Gennaro
2009-01-01
Abstract
We present high-resolution energy loss spectroscopy measurements on the dispersion and damping of collective electronic excitations in ultrathin Ag films grown on Cu(111) and Ni(111). For Ag/Cu(111) the surface plasmon was found to be confined within grains but confinement was removed by annealing. On the other hand, a purely quadratic dispersion was observed for the layer-by-layer Ag film deposited onto the Ni(111) surface. (c) 2008 Elsevier Ltd. All rights reserved.File in questo prodotto:
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