Van der Waals heterostructures based on three-dimensional topological insulators

Edge states, transport and topological properties of heterostructures in the SSH model

“…An important characteristic of these states is the linear dispersion relation, which makes them attractive for their application in high-speed electronics devices [12][13][14]. The helical propagation has spin-momentum locking property for application in heterostructures with magnetic materials in technologies such as spintronics [13,[15][16][17].…”

“…In the case of a few QLs, hybridization between the states increases and this causes a gaped energy bands, that behave as a trivial insulator. In this frame, the In 2 Se 3 is of great interest since it belongs to the same structural family of Bi 2 Se 3 of QLs, but measurements at the edge by ARPES and low energy models show a trivial insulator [36][37][38], this makes them relevant materials to build heterostructures with combined topological properties [15][16][17][39][40][41][42][43]. For example, [44] proposes a macroscopic global phase model where layers of Bi 2 Se 3 and In 2 Se 3 are combined to form a binary superlattice in configurations with a different number of QLs.…”