2025/12/05 by Kati Asikainen, Asikainen, Kati, Frédéric Chassot +27 · 1 citation
Materials Science · Physics and Astronomy · #2D Materials and Applications #Exfoliation joint #FOS: Physical sciences #Graphene research and applications #Materials Science (cond-mat.mtrl-sci) #Metal #Monolayer #Phase (matter) #Photoemission spectroscopy #Substrate (aquarium) #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2512.05616
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2025/12/05 · openalex created_date 2025/12/09 · openalex updated_date 2026/08/05
Metal-assisted exfoliation of two-dimensional (2D) materials has emerged as an efficient route to isolating large-area monolayer crystals, yet the influence of the supporting metal substrate on their intrinsic properties remains poorly understood. Here, we demonstrate successful gold-assisted exfoliation of monolayer IrTe2 up to the millimeter scale. Angle-resolved photoemission spectroscopy (ARPES), combined with first-principles calculations, reveals that the low-energy electronic structure closely resembles that of a freestanding monolayer 1T-IrTe2. We find that quasi-covalent hybridization together with substrate-induced strain leads to only modest modifications of the electronic bands. Although strain contributes to phase stability, it is essentially hybridization that drives the stabilization of the 1T-phase of the monolayer IrTe2 by suppressing stripe-ordered phase transitions. These results establish gold-assisted exfoliation as a robust route to prepare a large-area monolayer IrTe2 and highlight the role of metal-substrate interaction in engineering 2D materials with tailored structural phases.