PIRSA:21040031

Magnetism, Skyrmions and Superconductivity in Moiré Lattices

Vishwanath, A. (2021). Magnetism, Skyrmions and Superconductivity in Moiré Lattices. Perimeter Institute. https://pirsa.org/21040031

Vishwanath, Ashvin. Magnetism, Skyrmions and Superconductivity in Moiré Lattices. Perimeter Institute, Apr. 28, 2021, https://pirsa.org/21040031 

          @misc{ pirsa_PIRSA:21040031,
            doi = {10.48660/21040031},
            url = {https://pirsa.org/21040031},
            author = {Vishwanath, Ashvin},
            keywords = {Other},
            language = {en},
            title = {Magnetism, Skyrmions and Superconductivity in Moir{\'e} Lattices},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {apr},
            note = {PIRSA:21040031 see, \url{https://pirsa.org}}
          }

Ashvin Vishwanath Harvard University

DOI 10.48660/21040031
Collection
Talk Type Scientific Series
Subject

Abstract

The remarkable properties of electrons moving through crystalline lattices continue to surprise us. Recently, electrons in artificial moiré lattices have emerged as an extraordinary new platform. The simplest such moiré material consists of a pair of graphene sheets twisted relative to one another. At a  "magic" angle of about 1 degree, a variety of phenomena, including strong-coupling superconductivity, is observed. In this talk, I will review this rapidly moving field and describe our theoretical ideas that invoke the geometry of quantum states and topological textures like skyrmions. Finally, I will explain how these insights indicate a promising new family of moiré materials, twisted trilayer graphene, which is currently under active experimental study.