1. flat bands, sharp physics

Daniel Leykam   

National University of Singapore, Singapore

19 August 2021 Thu 4 pm

                                      IBS Center for Theoretical Physics of Complex Systems (PCS), Administrative Office (B349), Theory Wing, 3rd floor

                                      Expo-ro 55, Yuseong-gu, Daejeon, South Korea, 34126 Tel: +82-42-878-8633                     

Flat bands arise in periodic media when symmetries or fine-tuning result in perfect wavepacket localization. Flat band localization is fragile and exhibits remarkably sharp sensitivity to perturbations including interactions and disorder, leading to a variety of interesting quantum and classical phenomena. Originally a theoretical curiosity, advances in fabrication methods over the past decade now allow flat band physics to be observed down to the nanoscale. I will discuss how I first became interested in flat bands, summarise what we have learned to date, and speculate on where this exciting field is headed.