Enhanced asymmetry in monolayer graphene geometric diodes

Abstract

Monolayer graphene geometric diodes with neck width of 50 nm exhibit record high current asymmetry of 1.48. Diodes with neck angles of 30° and 45° show no significant change in asymmetry, while a reduction in asymmetry has been observed for a diode with a neck angle of 60°, attributed to the reduction in physical asymmetry of the diode structure.