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Surface and bulk contribution to Cu(111) quantum efficiency

Author:
Pedersoli, E.   Greaves, C. M. R.   Wan, W.   Coleman-Smith, C.   Padmore, H. A.   Pagliara, S.   Cartella, A.   Lamarca, F.   Ferrini, G.   Galimberti, G.   Montagnese, M.   dal Conte, S.   Parmigiani, F.  


Journal:
Applied Physics Letters


Issue Date:
2008


Abstract(summary):

The quantum efficiency (QE) of Cu(111) is measured for different impinging light angles with photon energies just above the work function. We observe that the vectorial photoelectric effect, an enhancement of the QE due to illumination with light with an electric vector perpendicular to the sample surface, is stronger in the more surface sensitive regime. This can be explained by a contribution to photoemission due to the variation in the electromagnetic potential at the surface. The contributions of bulk and surface electrons can then be determined.


Page:
183505


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