Figure 1.

a–c) Crystal structures of layered orthorhombic, hexagonal, monoclinic phases of 2D GIVMCs. d) Raman spectra of bulk SnS₂ at two excitation wavelengths (532, 633 nm). Gray and black vertical lines mark the main Raman lines of 2H–SnS₂ and 4H–SnS₂. e) Low‐energy electron diffraction pattern with overlaid irreducible wedge of the surface Brillouin zone. f) Angle resolved photoelectron spectroscopy of the projected band structure of bulk SnS₂. False color scale: Dark blue, lowest intensity; white, highest intensity. Black lines are results of DFT band structure calculations for 4H–SnS₂ using the HSE hybrid functional. g) Comparison of the calculated band structure of bulk (4H) and monolayer SnS₂. (d–g) Reproduced with permission.72 2014, American Chemical Society.