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 Bi${}_2$Se${}_3$ and SmB${}_6$ compounds, we find that the spin orientation of photo-electrons for SmB${}_6$ has different correspondence to pseudo spin and real spin compare to Bi${}_2$Se${}_3$, 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.

9 pages, 11 figures

References in corpus (7)

• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Correlated Topological Insulators with Mixed Valence
• Photoelectron spin-polarization-control in the topological insulator Bi2Se3
• Spin Polarization of Photoelectrons from Topological Insulators
• Circular dichroism in angle-resolved photoemission spectroscopy of topological insulators
• Surface Theory of a Family of Topological Kondo Insulators
• Model Hamiltonian for topological Kondo insulator SmB6

Cited by in corpus (5)

• Quantum Materials for Spin and Charge Conversion
• Spin Injection and Inverse Edelstein Effect in the Surface States of Topological Kondo Insulator SmB6
• Electrical detection of surface spin polarization of candidate topological Kondo insulator SmB6
• Electrical detection of the inverse Edelstein effect on the surface of SmB${}_6$
• Kramers-Weyl fermions in the chiral charge density wave material (TaSe${}_4$)${}_2$I