Descripción del proyecto
Ajuste del espín en conjuntos de átomos magnéticos mediante un sustrato de grafeno activado por tensión
El magnetismo se genera por el movimiento de cargas eléctricas, de modo que si unos electrones minúsculos giran como peonzas actúan como imanes microscópicos. La espintrónica, o el transporte electrónico de espín, aprovecha este efecto para reducir el consumo de energía y aumentar tanto la memoria como las capacidades de procesamiento de las tecnologías de computación cuántica de siguiente generación. Uno de los obstáculos para su uso ha sido el control del acoplamiento magnético entre los centros de espines individuales en grandes conjuntos de átomos magnéticos. El proyecto IMAGINE, con el apoyo de las Acciones Marie Skłodowska-Curie, está utilizando una red orgánica metálica para posicionar átomos magnéticos en redes ordenadas de largo alcance sobre un sustrato de grafeno que permitirá aplicar tensión para una rotación precisa del espín.
Objetivo
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.
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MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinador
601 90 Brno Stred
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