Producing large-area single-crystalline graphene is key to realizing its full potential in advanced applications, including twistronics. Yet, controlling graphene growth kinetics to avoid grain boundaries or multilayer growth remains challenging. Here, we demonstrate single-crystalline graphene free from multilayer domains via one-step delamination of epitaxial graphene from silicon carbide (SiC). This is enabled by a specific surface reconstruction of 4H-SiC(0001) achieved in our growth conditions. High crystalline quality is confirmed by the observation of the half-integer quantum Hall effect -- the hallmark of monolayer graphene -- in near cm-sized crystals. The scalability of our process, explored with 4''-wafers, represents an advance toward large-scale integration of high-performance graphene applications.
@article{arxiv.2512.00394,
title = {Wafer-Scale Single-Crystalline Monolayer Graphene},
author = {Johanna Huhtasaari and Joyal Jain Palakulam and Awse Salha and Per Hyldgaard and Elsebeth Schröder and Magnus Hårdensson Berntsen and Oscar Tjernberg and Manasi Shah and Rodrigo Martinez-Duarte and Hans He and Johannes Hofmann and Thilo Bauch and Naveen Shetty and Samuel Lara-Avila},
journal= {arXiv preprint arXiv:2512.00394},
year = {2025}
}