Regensburg 2019 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 32: Focus Session: Designer Quantum Systems II (joint session O/TT)

TT 32.2: Invited Talk

Tuesday, April 2, 2019, 14:30–15:00, H15

Electronic properties of twisted graphene layers: bands, interactions and superconductivity. — •Francisco Guinea — Imdea Nanscience, Faraday , 28049 Madrid, Spain — School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK

Twisted graphene bilayers show an unusual band structure, with very narrow bands. In these bands, states with different momenta show significant variations in their charge density. A change in the number of carriers leads to inhomogeneous charge distributions, which, in turn, modify significantly the shape of the bands. This effect can be described in terms of emergent assisted hopping interactions. These couplings tend to favor superconductivity.