Heterostructures composed of two-dimensional (2D) materials are already opening many new possibilities in such fields of technology as electronics and magnonics, but far more could be achieved if the number and diversity of 2D materials is increased. So far, only a few dozen 2D crystals have been extracted from materials that exhibit a layered phase in ambient conditions, omitting entirely the large number of layered materials that may exist in other temperatures and pressures. Here, we demonstrate how these structures can be stabilized in 2D van der Waals stacks under room temperature via growing them directly in graphene encapsulation by using graphene oxide as the template material. Specifically, we produce an ambient stable 2D structure of copper and iodine, a material that normally only occurs in layered form at elevated temperatures between 645 and 675 K. Our results establish a route to the production of more exotic phases of materials that would otherwise be difficult or impossible to stabilize for experiments in ambient.
@article{arxiv.2109.08456,
title = {Towards Exotic Layered Materials: 2D Cuprous Iodide},
author = {Kimmo Mustonen and Christoph Hofer and Peter Kotrusz and Alexander Markevich and Martin Hulman and Clemens Mangler and Toma Susi and Timothy J. Pennycook and Karol Hricovini and Christine M. Richter and Jannik C. Meyer and Jani Kotakoski and Viera Skakalova},
journal= {arXiv preprint arXiv:2109.08456},
year = {2021}
}
Comments
15 pages, 6 figures, separate supplementary material included