Charge and Spin Instabilities in Graphene and Magnetic Two-Dimensional Materials

Explore theoretical approaches for studying magnetic and charge instabilities in low-dimensional materials during this 51-minute seminar presented by Dr. Andrey Katanin at the Abrikosov Center for Theoretical Physics. Delve into the application of functional renormalization group and dynamical mean field theory methods across various materials including single-layer and twisted bilayer graphene, two-dimensional ferromagnetic materials, and cuprates. Learn about the spin density wave instability in single-layer graphene and its enhancement through vacancies, as well as the SU(4) charge/spin density state found in twisted bilayer graphene at even integer fillings. Examine magnon dispersion in two-dimensional ferromagnetic materials and cuprates, investigating the possibility of ferro- or spin density wave magnetic order along with other magnetic properties.