Abstract
Energy distribution curves (EDC) of secondary electrons from W(1 1 0) were measured for spin-up ( I + ) and spin-down ( I − ) polarization of the incident beam. The intensity asymmetry, defined as A = ( I + − I − )/( I + + I − ), for a certain experimental geometry was measured as large as 7%. This asymmetry was explained in terms of a “spin-filter” effect. The model assumes that the secondary electrons excited by spin-polarized primary electrons are spin-polarized inside the solid. On the way to the vacuum they undergo spin–orbit interaction on the surface barrier that provides the spin-dependent and energy selective transmission through the surface.
Published Version
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