Silicon Layer Intercalation of Centimeter-Scale, Epitaxially-Grown Monolayer Graphene on Ru(0001)

TL;DR

This paper presents a silicon-layer intercalation method for growing high-quality, large-area graphene on Ru(0001), enabling precise control of graphene-metal distance and enhancing its electronic properties for advanced applications.

Contribution

The study introduces a novel silicon-layer intercalation approach (SIA) for epitaxial graphene on Ru(0001), improving structural and electronic qualities while allowing atomic-scale control of the graphene-metal interface.

Findings

High-quality, large-area graphene achieved on Ru(0001)

Silicon intercalation weakens graphene-metal interaction

Atomic control of graphene-metal distance demonstrated

Abstract

We develop a strategy for graphene growth on Ru(0001) followed by silicon-layer intercalation that not only weakens the interaction of graphene with the metal substrate but also retains its superlative properties. This G/Si/Ru architecture, produced by silicon-layer intercalation approach (SIA), was characterized by scanning tunneling microscopy/spectroscopy and angle resolved electron photoemission spectroscopy. These experiments show high structural and electronic qualities of this new composite. The SIA allows for an atomic control of the distance between the graphene and the metal substrate that can be used as a top gate. Our results show potential for the next generation of graphene-based materials with tailored properties.