Imperial College London


Faculty of EngineeringDepartment of Materials

Professor of Theory and Simulation of Materials



+44 (0)20 7594 8154a.mostofi Website




Bessemer B332Royal School of MinesSouth Kensington Campus






BibTex format

author = {Goodwin, ZAH and Corsetti, F and Mostofi, AA and Lischner, J},
doi = {10.1103/physrevb.100.121106},
journal = {Physical Review B},
title = {Twist-angle sensitivity of electron correlations in moiré graphene bilayers},
url = {},
volume = {100},
year = {2019}

RIS format (EndNote, RefMan)

AB - Motivated by the recent observation of correlated insulator states and unconventional superconductivity in twisted bilayer graphene, we study the dependence of electron correlations on the twist angle and reveal the existence of strong correlations over a narrow range of twist angles near the magic angle. Specifically, we determine the on-site and extended Hubbard parameters of the low-energy Wannier states using an atomistic quantum-mechanical approach. The ratio of the on-site Hubbard parameter and the width of the flat bands, which is an indicator of the strength of electron correlations, depends sensitively on the screening by the semiconducting substrate and the metallic gates. Including the effect of long-ranged Coulomb interactions significantly reduces electron correlations and explains the experimentally observed sensitivity of strong-correlation phenomena on twist angles.
AU - Goodwin,ZAH
AU - Corsetti,F
AU - Mostofi,AA
AU - Lischner,J
DO - 10.1103/physrevb.100.121106
PY - 2019///
SN - 2469-9950
TI - Twist-angle sensitivity of electron correlations in moiré graphene bilayers
T2 - Physical Review B
UR -
UR -
VL - 100
ER -