Topological zero-line mode of bilayer graphene with Rashba spin-orbital coupling and staggered sublattice potentials

TL;DR

This paper investigates the topological zero-line modes in bilayer graphene with Rashba spin-orbital coupling and staggered sublattice potentials, revealing various zero-line modes and a Y-shaped current partition at domain junctions.

Contribution

It introduces new types of zero-line modes in bilayer graphene with spin-orbital coupling and sublattice potentials, including a pure spin filtering mode and current partitioning mechanisms.

Findings

Identification of various zero-line modes including spin filtering

Proposal of Y-shaped current partition at domain junctions

Analysis of domain wall properties in bilayer graphene

Abstract

Domain wall in bilayer graphene with Rashba spin-orbital coupling and staggered sublattice potentials, at the interface between two domains with different gated voltages, is studied. Varying type of zero-line modes are identified, including zero-line mode with pure spin filtering effect. The Y-shape current partition at the junction among three different domains are proposed.