PIRSA:20110000 Scientific Series Condensed Matter

DOI10.48660/20110000

Berg, E. (2020). New physics in flat Moire bands. Perimeter Institute. https://pirsa.org/20110000

Berg, Erez. New physics in flat Moire bands. Perimeter Institute, Nov. 02, 2020, https://pirsa.org/20110000 

@misc{ pirsa_PIRSA:20110000,
  doi = {10.48660/20110000},
  url = {https://pirsa.org/20110000},
  author = {Berg, Erez},
  keywords = {Condensed Matter},
  language = {en},
  title = {New physics in flat Moire bands},
  publisher = {Perimeter Institute},
  year = {2020},
  month = {nov},
  note = {PIRSA:20110000 see, \url{https://pirsa.org}}
}

Abstract

Flat bands in Moire superlattices are emerging as a fascinating new playground for correlated electron physics. I will present the results of several studies inspired by these developments. First, I will address the question of whether superconductivity is possible even in the limit of a perfectly flat band. Then, I will discuss transport properties of a spin-polarized superconductor in the limit of zero spin-orbit coupling, where the topological structure of the order parameter space allows for a new dissipation mechanism not known from conventional superconductors. If time allows, I will also discuss the interpretation of new measurements of the electronic compressibility in twisted bilayer graphene, indicating a cascade of symmetry-breaking transitions as a function of the density of carriers in the system. 

 

References:

https://arxiv.org/abs/2006.10073

https://arxiv.org/abs/1912.08848

https://arxiv.org/abs/1912.06150

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