Electronic properties of the steps in bilayer Td-WTe₂

Abstract Monolayer WTe 2 stripes are quantum spin Hall (QSH) insulators. Density functional theory was used for investigating the electronic properties of and steps in bilayer Td -WTe . For oriented along dimer chains W atoms ( x direction), hybridization between two layers suppresses QSH states. However, nature can be recovered by forming a step, depending on atomic structure step. Conversely, y direction maintain These findings expand application range states