Nanowrinkle Waveguide in Graphene for Enabling Secure Dirac Fermion Transport

TL;DR

This paper introduces a nanowrinkle waveguide in graphene that enables secure, ballistic Dirac fermion transport by strain engineering, offering a new method for quantum information transfer.

Contribution

It presents a novel strain-engineered nanowrinkle waveguide in graphene that facilitates secure and controlled Dirac fermion transport for quantum information applications.

Findings

Ballistic Dirac fermion transport achieved along nanowrinkles.

Guided transport persists in bent nanowrinkles unless the bend is too large.

Strain engineering enables nanoscale confinement in gapless graphene.

Abstract

Localized states in graphene have garnered significant attention in quantum information science due to their potential applications. Despite graphene's superior transport and electronic properties compared to other semiconductors, achieving nanoscale confinement remains challenging due to its gapless nature. In this study, we explore the unique transport properties along nanowrinkles in monolayer graphene. We demonstrate the creation of a one-dimensional conduction channel by alternating pseudo-magnetic fields along the nanowrinkle, enabling ballistic Dirac fermion transport without leakage. This suggests a feasible method for secure quantum information transfer over long distances. Furthermore, we extend our analysis to bent nanowrinkles, showcasing well-guided Dirac fermion propagation unless the bent angle is sufficiently large. Our demonstration of the nanowrinkle waveguide in graphene introduces a novel approach to controlling Dirac fermion transport through strain engineering, for quantum information technology applications.