Electronic Structure of Decoupled TaS ₂ in (SnS) _1.15 (TaS ₂ ) Studied by Angle-Resolved Photoemi

We investigate the electronic structure of TaS ₂ in the so-called misfit compound (SnS) _1.15 (TaS ₂ ) by angle-resolved photoemission spectroscopy. Our results reveal that in contrast to 2H-TaS ₂ , TaS ₂ layer in (SnS) _1.15 (TaS ₂ ) does not exhibit a three-dimensional character: it behaves as a relatively electronically isolated unit with an effective spin–orbit coupling. We find the band shifts near the Fermi level and very weak dispersion along the k[Formula: see text] direction. SnS-derived electronic states below the Fermi level reflect the structural flexibility of the SnS layer, suggesting that an unconventional covalent bonding plays a role in the crystal stability of (SnS) _1.15 (TaS ₂ ).