Matrix-element induced spin polarization of photoelectrons from bulk bands
Abstract
Angular- or -resolved photoelectron spectroscopy in the soft X-ray range gives access to the bulk electronic structure of materials. Here this technique is extended to the spin degree of freedom. A non-magnetic material (tungsten) was chosen, in order to exclude any initial-state spin polarization from exchange-split bands. By measurement of two spin-polarizations for different light helicity, one can distinguish between contributions of optical spin-orientation by circularly-polarized X-rays (Fano componen) and a second component originating from interference of final-state partial waves. Both phenomena have so far only been observed at low photon energies. Their detection in the X-ray range is a milestone on the way to the "complete experiment" in bulk photoemission.
Keywords
Cite
@article{arxiv.1810.11403,
title = {Matrix-element induced spin polarization of photoelectrons from bulk bands},
author = {Dmitry Vasilyev and Katerina Medjanik and Sergey Babenkov and Martin Ellguth and Gerd Schönhense and Hans-Joachim Elmers},
journal= {arXiv preprint arXiv:1810.11403},
year = {2018}
}