Spin Polarization of Electrons Field Emitted from Single-Crystal Iron Surfaces
- 22 May 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 40 (21), 1401-1403
- https://doi.org/10.1103/physrevlett.40.1401
Abstract
The spin polarization of electrons field emitted from single-crystal iron surfaces was observed to be (+25±5)% for emission along [100], (+25±5)% along [111], and (-5±10)% along [110] (the polarization is positive for majority-spin electrons). These results correlate qualitatively with expectations from the bulk band model. However, quantitative calculations with bulk wave functions gave strongly parameter-dependent results. For meaningful calculations the effect of the surface on the wave functions must be included.Keywords
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