RKKY Interactions on Dirac Surfaces by Herbert A Fertig
Explore RKKY interactions on Dirac surfaces in this comprehensive lecture from the ICTS Discussion Meeting on Edge Dynamics in Topological Phases. Delve into effective spin-spin interactions, perturbation theory approaches, and RKKY interactions in graphene as a paradigm for Dirac surfaces. Examine helical electron wavefunctions, spin impurity locations, and strong local antiferromagnetic correlations. Investigate methods to induce ferromagnetism in graphene through symmetry breaking and strain. Analyze the breakdown of second-order perturbation theory and explore mean-field theory for RKKY interactions in strained graphene. Conclude with insights on Dirac surfaces in topological insulators and topological crystalline insulators, followed by a summary and Q&A session.