Spin-polarized photoemission from quantum well and interface states (invited)
1994; American Institute of Physics; Volume: 76; Issue: 10 Linguagem: Inglês
10.1063/1.358059
ISSN1520-8850
AutoresC. Carbone, E. Vescovo, R. Kläsges, W. Eberhardt, O. Rader, W. Gudat,
Tópico(s)Quantum and electron transport phenomena
ResumoWe examine the role of quantum well and interface states in mediating the coupling between magnetic films. We have studied with spin- and angle-resolved photoemission the electronic structure of Cu on Co(100) and Ag on Fe(100). Noble metal states of sp-derived character are found to be spin-polarized upon contact with the magnetic materials. In Cu films up to 10 monolayer thickness polarized states have been observed. These observations are well described within the framework of one-dimensional quantum-well states, for film thicknesses above a few monolayers. In the low coverage regime, the hybridization with the magnetic states of the substrate strongly influences the character and the dispersion of the conduction bands.
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