Pseudo-Spin, Real-Spin and Spin Polarization of Photo-emitted Electrons
Abstract
In this work, we discuss the connections between pseudo spin, real spin of electrons in material and spin polarization of photo-emitted electrons out of material. By investigating these three spin textures for Bi2Se3 and SmB6 compounds, we find that the spin orientation of photo-electrons for SmB6 has different correspondence to pseudo spin and real spin compare to Bi2Se3, due to the different symmetry properties of the photo-emission matrix between initial and final states. We calculate the spin polarization and circular dichroism spectra of photo-emitted electrons for both compounds, which can be detected by spin-resolved and circular dichroism angle resolved photo-emission spectroscopy experiment.
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