H2020Индивидуална стипендия2021–2023

IMAGINE · Indirect Magnetic Interactions: Tuning by Electric Field

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2021-09-01 → 2023-08-31
Финансиране от ЕС: 156 981 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Магнитни атоми върху графен се изследват за създаване на подредени структури, чиито взаимодействия могат да се управляват с електрическо поле. Това помага за развитието на по-мощни компютри чрез технологиите на квантовите изчисления и спинтрониката.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Indirect Magnetic Interactions: Tuning by Electric Field

With silicon-based electronics nearing its limits, spintronics and quantum computing have emerged as technologies promising unprecedented computational power. The fundamental research in this area shows that single metal atoms on well-defined surfaces can serve as qubits, but one major challenge is upscaling. We address this issue by developing protocols for synthesis of large, atomically-ordered arrays of magnetic metal atoms supported on graphene. Graphene is a perfect material for such applications due to its chemical inertness and tunability of charge carrier density by doping. Thus, synthesizing atomically-ordered arrays of magnetic atoms atop graphene opens up fascinating possibilities to design spintronic systems on a technologically relevant support, and also adjust the strength of the magnetic interaction between the individual spin centres. In an envisioned graphene field-effect transistor decorated by an array of magnetic atoms, such tuning of the magnetic interaction could be done in real time. Once fully developed, such a device presents a true dream system for spintronics and quantum computing research, both fundamental and applied. Within this project, we have made some crucial steps towards this goal. Specifically, we have demonstrated that various 2D magnetic metal-organic frameworks (MOFs) can be synthesized atop graphene supports with different doping levels. We have also demonstrated that these systems are remarkably stable, and even though their synthesis requires ideal conditions of ultrahigh vacuum, they remain stable and atomically-defined even in ambient. Most of the current knowledge of atomically-defined 2D MOFs has been learned on metal supports, therefore we invested a great effort to unravel how the change from metal support to graphene affects the main system parameters, i.e. physical and electronic structure, chemical reactivity, and magnetic ordering. Lastly, we studied how the different doping level of the graphene changes the charge distribution within the MOF. Overall, the main objectives of the project have been fulfilled, and our work clearly contributes to the development of spintronics applications based on 2D metal-organic materials.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

With silicon-based electronics nearing its limits, spintronics and quantum computing have emerged as technologies promising unprecedented amounts of computational power. One of the biggest challenges in these fields is engineering of systems allowing full control over large arrays of identical spin-centres. In this project I aim to tackle this issue by fabricating a spintronic device in which one of the crucial parameters - the magnetic coupling between individual spin centres - can be efficiently modulated. This will be achieved by synthesizing a magnetic metal-organic network on top of a graphene field-effect transistor. Here, the metal-organic network allows precise positioning of magnetic atoms into long-range-ordered lattices, and the gated graphene substrate enables precise tuning of the charge transfer from the deposited molecules via the applied gate voltage. Thus, this project simultaneously addresses practical issues in device fabrication, as well as the fundamental mechanisms of magnetic coupling. Such a broad goal requires a concerted effort from researchers of different backgrounds. The shared expertise of the Host Group at the Central European Institute of Technology (CEITEC) and me is optimally suited for this project: I am experienced in atomically-resolved imaging, spectroscopy, and reactivity studies of both conductive and insulating systems. The Host Group has extensive experience with molecular self-assembly and graphene devices, and the Host Institution recently developed a novel state-of-the-art apparatus for Electron Spin Resonance Spectroscopy, a technique exquisitely sensitive for probing weak magnetic interactions. Overall, this project will provide fundamental insight into the characteristics of weak magnetic interactions, for which current literature provides many conflicting predictions. The resulting device will additionally serve as an ideal platform for further spintronic applications and quantum computing studies.

Оригинален текст от CORDIS (на английски).

Участници

VYSOKE UCENI TECHNICKE V BRNE · BRNO STREDКоординаторЧехия