Fig. 1: Topology, lattice property, and band structure of 2D Weyl semimetal, α-bismuthene grown on SnS.
From: Realization of a two-dimensional Weyl semimetal and topological Fermi strings
a Overview of Dirac/Weyl semimetals and their topological boundary states. b Side and top views of the lattice structure of bismuthene and SnS substrate. The red dashed squares indicate the unit cell of bismuthene and SnS. c Large-scale STM image of bismuthene grown on SnS substrate. d The height profile is taken along the red arrow in (c). e Zoom-in STM images of bismuthene (top) and the surface of SnS (bottom). The red dashed squares indicate the unit cell of SnS and bismuthene. f Calculated band structure of free-standing bismuthene. g Calculated band structure of bismuthene on SnSe.
