Allan Macdonald, University of Texas at Austin
PAA A102
The electronic properties of thin films of rhombohedral graphene encapsulated by hexagonal Boron nitride are amazingly rich, with phase diagrams that break all the rules – including include superconductors that are also orbital and spin ferromagnets and quantum anomalous Hall states without any magnetic field. But don’t panic – a rational solution exists. I will discuss the important role played in these properties by momentum space condensation - an old idea that goes back to work by London and Heisenberg - and the quantum geometry of Bloch states - a new idea that has guided a great deal of condensed matter physics research over recent decades. Some of the advice in this guide in this guide may be unreliable.