R. Bertacco et F. Ciccacci, Oxygen-induced enhancement of the spin-dependent effects in electron spectroscopies of Fe(001), PHYS REV B, 59(6), 1999, pp. 4207-4210
Oxygen adsorption in an ordered p(1 X 1) fashion on the Fe(001) surface has
been studied by empty states spectroscopies using a spin-polarized electro
n beam. The low-energy electron absorption and reflection display a much la
rger spin dependence in Fe(001)-p(1 X 1)O than in Fe(001). Peak values of t
he spin asymmetries of the absorbed (reflected) current larger than 13% (45
%) at around 9-11 eV above the Fermi level are found. Spin-resolved inverse
photoemission reveals that in the same energy range the exchange splitting
between majority- and minority-spin states in Fe(001)-p(1 X 1)O is similar
to 50% larger than in the clean surface. [S0163-1829(99)09905-1].