A New Spin on Photoemission Spectroscopy Page: 90 of 259
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Further and unique insight into the electronic structure of solids and into the
photoemission process can be obtained by analyzing the spin orientation of the
The previous chapter gave a brief look into the power of ARPES for probing the elec-
tronic structure of solids. It was shown that by resolving both photoelectron energy and
momentum (emission angle), high-resolution ARPES can not only perform bandmapping
and Fermi surface topology mapping, but can also provide information regarding many-body
interactions through direct access to the single particle spectral function. This chapter will
detail how resolving the spin orientation of the photoelectrons can provide additional in-
formation about a material's electronic structure as well as insights into the photoemission
process itself. Spin polarization (degree of imbalance between spin-up and -down along
some axis) of photoelectrons is certainly expected from ferromagnetic systems in which the
density of states is polarized, but photoemission from non-magnetic samples may also be
spin polarized due to the spin-orbit interaction and the use of circularly polarized light.
Either way, additional information can be obtained with measurement of the photoelectron
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Jozwiak, Chris. A New Spin on Photoemission Spectroscopy, thesis or dissertation, December 1, 2008; United States. (https://digital.library.unt.edu/ark:/67531/metadc1014237/m1/90/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.