Jingcheng Li

Academic Affiliation: Sun Yat-sen University

Title: Inducing magnetic properties in graphene nanostructures

Abstract:

Spin in carbon-based materials shows long coherence time, tunable coupling strength, and can be incorporated into scalable carbon platform, which makes it promising for quantum computing and spintronics applications.  Predictions state that graphene structures with specific edge topology can spontaneously develop magnetism, but the difficulty in their synthesis and magnetism characterization hinders the experimental verification. Here in this talk, I will show you our latest results on the observation and manipulation of magnetic moments in such graphene open-shell nanostructures. The graphene open-shell nanostructures with different edge topology, size and doping are created on a gold surface through on-surface synthesis route with atomic precision. Using scanning tunneling spectroscopy, we can detect the presence of electron spins and map their localization. With the experimental results and theoretical simulations, I will demonstrate that how the electronic correlations, πbond frustration or topological band engineering can be used to induce spin states in graphene nanostructures.