Spin-split image-potential-induced surface state on Ni(111)
The magnetic exchange splitting of surface electronic states has attracted considerable interest because these states act as sensors of the surface magnetic properties that may be quite different from the corresponding bulk properties. Non-spin-resolved photoemission (PES) has detected occupied surface states on nickel as double-peak structures being interpreted as energetically separated minority and majority spin emissions. Spin-resolved inverse photoemission (IPE) measurements of the n = 1 image-potential-induced surface state on Ni(111) reveal a magnetic exchange splitting of 18 +/- 3 meV. The size of the splitting is in accordance with calculations within the one-step model of inverse photoemission assuming the barrier potential as spin independent, but taking into account the different energy positions of the spin-up and spin-down band-gap boundaries. It is shown that spin resolution in experiments enables detection of spin splittings considerably smaller than the linewidths of the spectral features.
Bibliographic Reference: Article: Physical Review Letters, Vol. 69 (1992) No. 7, pp. 1101-1104
Record Number: 199211548 / Last updated on: 1994-11-29
Original language: en
Available languages: en