Longer Living Majority than Minority Image State at Fe(110)
A strongly spin dependent lifetime is reported for the n = 1 image potential surface state at Fe(110). Spin resolved inverse photoemission measurements reveal an intrinsic linewidth of 140 ± 10 meV for the minority image state, about twice as large as the 70 ± 10 meV observed for the majority state. The spin dependence of the lifetime can be explained in terms of the spin dependent density of bulk electronic states in iron, on the assumption that escape into bulk states accompanied by electron hole pair production is the main decay channel. The binding energies are magnetically split by 57 ± 5 meV. This result supports the predicted predominant influence of the spin polarized substrate potential on the binding energy, modified by a smaller effect of the spin polarized surface barrier.
Bibliographic Reference: Article: Physical Review Letters, Vol. 75 (1995) No. 14, pp. 2746-2749
Record Number: 199610155 / Last updated on: 1996-03-01
Original language: en
Available languages: en