Two-dimensional (2D) materials with frustrated crystal geometries can host strongly correlated electrons, potentially leading to a range of exotic many-body quantum phases such as Mott insulators, quantum spin-liquids, and Kondo lattices. The ability to control exchange-coupling within these systems is therefore highly desirable. Here, we use an atomically sharp scanning tunneling microscope probe to vertically manipulate a 2D Mott insulating kagome metal-organic framework (MOF) featuring Kondo-screened local magnetic moments on Ag(111). We show that by controlling the adsorption height of the MOF, we can also controllably and reversibly change the strength of Kondo coupling between the MOF's local spins and the substrate's conduction electrons. This mechanical control of Kondo coupling could be extended to other forms of interlayer exchange coupling, potentially allowing for atomic-scale design or control of spintronics technologies.
@article{arxiv.2512.16194,
title = {Atomic-scale control of substrate-spin coupling via vertical manipulation of a 2D metal-organic framework},
author = {Benjamin Lowe and Bernard Field and Dhaneesh Kumar and Daniel Moreno Cerrada and Oleksandr Stetsovych and Julian Ceddia and Andrés Pinar Solé and Amelia Domínguez-Celorrio and Jack Hellerstedt and Sinéad M. Griffin and Pavel Jelínek and Agustin Schiffrin},
journal= {arXiv preprint arXiv:2512.16194},
year = {2025}
}