Lavoisier Discussion - Flatbands

Paris, 5 June 2019

http://www.graphene-and-co.org/?-Flatbands-

When two graphene lattices are overlaid and tilted, they interfere to create a moiré pattern with a long period. At a small angle of about 1.1º, it was recently shown that the twisted bilayer graphene stack becomes superconducting. At this “magic” angle, the energy dispersion of electrons becomes flat and the interaction parameter becomes large.  These properties have strong similarities with those of cuprates and other high-temperature superconductors. Recently, rhombohedral multilayer graphene was also shown to feature flatbands and superconductivity.

These recent advances show that graphene and related materials represent a promising platform for exploring unconventional superconductivity. More generally, in this workshop we will discuss superconductivity, charge density wave and transport in flat band systems. It will also be interesting to compare future progresses to what has been established in other unconventional superconductors, such as VSe2 multilayer flakes and LaAlO3/SrTiO3 interfaces.

The goal of this one-day Lavoisier Discussion is to stimulate discussions on this emerging topic (both on theoretical and experimental aspects) and to foster collaborations among French and European groups interested in flatbands physics. An important objective is to bridge the different scientific communities. For this reason, considerable time will be left for discussions, posters and round table debates.

 This Lavoisier Discussion is organized under the umbrella of the GDR  and GDR-I Graphene & Co. It will take place just after the international workshop "Moiré in Paris 2019 (June 3-4)" and at the same location (ENS, Paris). https://moireinparis2019.phys.ens.fr/index.php
Attendants are encouraged to participate in both events, which are meant to be complementary.

Registration and information : please send an email to [email protected] with the email subject "Lavoisier discussion registration". A short abstract should be added when applying for a contributed talk. There is room for several contributed talks.

The registration is free.

Adrian Bachtold, Christophe Voisin and Matteo Calandra