Quantum seminar | 10 December 2025

I’ll introduce some playful but insightful aspects of Fermi-liquid theory—the familiar metallic phase we all know, but with a few twists. The talk is split into two parts. First, we’ll look at an unexpected experimental observation and discuss how we interpret it theoretically. The focus will be on 2D organic materials and the intriguing pressure and effective-mass dependence of the residual resistivity. In the second part, we’ll shift to more conceptual ground and explore the meaning of the effective mass itself. I’ll present a sum rule that, to the best of our knowledge, has not been previously noted.