Highly oriented SrTiO3 thin film on graphene substrate

TL;DR

This paper demonstrates the successful growth of highly oriented SrTiO3 thin films on graphene substrates using pulsed laser deposition, highlighting graphene's role in promoting crystalline quality and interface sharpness for potential device applications.

Contribution

It introduces a novel method for growing crystalline SrTiO3 on silicon via graphene, enabling integration of complex oxides into silicon-based technologies.

Findings

Highly (00l)-oriented SrTiO3 film achieved

Graphene suppresses chemical intermixing at interface

Potential for expanded device applications

Abstract

Growth of perovskite oxide thin films on Si in crystalline form has long been a critical obstacle for the integration of multifunctional oxides into Si-based technologies. In this study, we propose pulsed laser deposition of a crystalline SrTiO3 thin film on a Si using graphene substrate. The SrTiO3 thin film on graphene has a highly (00l)-oriented crystalline structure which results from the partial epitaxy. Moreover, graphene promotes a sharp interface by highly suppressing the chemical intermixing. The important role of graphene as a 2D substrate and diffusion barrier allows expansion of device applications based on functional complex oxides.