Tailoring the magnetic interaction in lanthanide-based metal-organic spin networks on metallic substrates

Modulating the magnetic interactions between molecular spins qubits is a crucial step in the development of robust multi-qubit architectures for quantum computing. Currently, there is a growing interest on surface-supported molecular systems that exhibit strong interactions among their internal spin centers. Ideally, this magnetic coupling between molecular spin qubits could be controlled by the interaction of this latter with the substrate. To address this challenge, and by employing X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD), we propose to investigate two new surface-supported metal-organic framework (MOF) candidates: Fe-TCPP and Ln-Fe-TCPP (where Ln represents Dy, Tm). Our objective is to characterize the electronic and magnetic configurations of these MOFs, and gain insights into their magnetic coupling properties on various metal substrates. By embarking on this research, we aim to shed light on the intricate magnetic coupling mechanisms that underlie the behavior of spin centers within MOFs. Ultimately, this knowledge will not only contribute to the advancement of quantum computing but also open new avenues in materials science, allowing for the deliberate engineering of molecular systems with tailored magnetic interactions, bringing us closer to realizing the full potential of quantum information processing.