Hidden spin-orbital texture at the $$\overline{{{\Gamma }}}$$ Γ ¯ -located valence band maximum of a transition metal dichalcogenide semiconductor

Abstract

Materials with time reversal and inversion symmetry have a bulk band structure that is spin degenerate, however, they can still exhibit a hidden spin-polarization when probed in a specific way. Here, using angle and spin resolved photoemission, Clark et al reveal a hidden spin-polarization in 1T-HfSe2 that persists through the time reversal invariant momenta due to effective spin-orbital magnetisations