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Relation between spin–orbit induced spin polarization, Fano-effect and circular dichroism in soft x-ray photoemission
- Source :
- Journal of Physics: Condensed Matter. 32:135501
- Publication Year :
- 2019
- Publisher :
- IOP Publishing, 2019.
-
Abstract
- A Feynman diagram analysis of photoemission probabilities suggests a relation between two final-state spin polarization effects, the optical spin-orientation originating from the interaction with circularly polarized light ([Formula: see text], Fano effect) and the spin polarization induced by the spin-orbit scattering ([Formula: see text], Mott effect). The analysis predicts that [Formula: see text] is proportional to the product of [Formula: see text] and the circular dichroism in the angular distribution (CDAD) of photoelectrons. To confirm this prediction, the spin polarization of photoelectrons excited by soft x-ray radiation from initial spin-degenerate bulk states of tungsten using time-of-flight momentum microscopy with parallel spin detection has been measured. By measurement of four independent photoemission intensities for two opposite spin directions and opposite photon helicity, CDAD, Fano, and Mott effect are distinguished. The results confirm the prediction from the Feynman diagram analysis.
- Subjects :
- Physics
Photon
Condensed matter physics
Spin polarization
Scattering
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Helicity
symbols.namesake
Excited state
0103 physical sciences
symbols
Feynman diagram
Condensed Matter::Strongly Correlated Electrons
General Materials Science
010306 general physics
0210 nano-technology
Spin (physics)
Circular polarization
Subjects
Details
- ISSN :
- 1361648X and 09538984
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Journal of Physics: Condensed Matter
- Accession number :
- edsair.doi.dedup.....297a194b6f6313936e3b84f18a3014a7