Specular Electron Focusing between Gate-Defined Quantum Point Contacts in Bilayer Graphene
Specular Electron Focusing between Gate-Defined Quantum Point Contacts in Bilayer Graphene
We report multiterminal measurements in a ballistic bilayer graphene (BLG) channel, where multiple spin- and valley-degenerate quantum point contacts (QPCs) are defined by electrostatic gating. By patterning QPCs of different shapes along different crystallographic directions, we study the effect of size quantization and trigonal warping on transverse electron focusing (TEF). …