Imperial College London
Alternate

ProfessorArashMostofi

Faculty of Engineering, Department of Materials

Professor of Theory and Simulation of Materials
 
 
 
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Contact

 

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

 
 
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Location

 

Bessemer B332Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Goodwin:2021:10.1103/PhysRevMaterials.5.084008,
author = {Goodwin, Z and Klebl, L and Vitale, V and Liang, X and Gogtay, V and Gorp, XV and Kennes, DM and Mostofi, AA and Lischner, J},
doi = {10.1103/PhysRevMaterials.5.084008},
journal = {Physical Review Materials},
title = {Flat bands, electron interactions and magnetic order in magic-angle mono-trilayer graphene},
url = {http://dx.doi.org/10.1103/PhysRevMaterials.5.084008},
volume = {5},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Starting with twisted bilayer graphene, graphene-based moiré materials have recently been established as a new platform for studying strong electron correlations. In this paper, we study twisted graphene monolayers on trilayer graphene and demonstrate that this system can host flat bands when the twist angle is close to the magic angle of 1.16. When monolayer graphene is twisted on ABA trilayer graphene, the flat bands are not isolated, but are intersected by a Dirac cone with a large Fermi velocity. In contrast, graphene twisted on ABC trilayer graphene (denoted AtABC) exhibits a gap between flat and remote bands. Since ABC trilayer graphene and twisted bilayer graphene are known to host broken-symmetry phases, we further investigate the ostensibly similar magic-angle AtABC system. We study the effect of electron-electron interactions in AtABC using both Hartree theory and an atomic Hubbard theory to calculate the magnetic phase diagram as a function of doping, twist angle, and perpendicular electric field. Our analysis reveals a rich variety of magnetic orderings, including ferromagnetism and ferrimagnetism, and demonstrates that a perpendicular electric field makes AtABC more susceptible to magnetic ordering.
AU  - Goodwin,Z
AU  - Klebl,L
AU  - Vitale,V
AU  - Liang,X
AU  - Gogtay,V
AU  - Gorp,XV
AU  - Kennes,DM
AU  - Mostofi,AA
AU  - Lischner,J
DO  - 10.1103/PhysRevMaterials.5.084008
PY  - 2021///
SN  - 2475-9953
TI  - Flat bands, electron interactions and magnetic order in magic-angle mono-trilayer graphene
T2  - Physical Review Materials
UR  - http://dx.doi.org/10.1103/PhysRevMaterials.5.084008
UR  - http://arxiv.org/abs/2105.12641v1
UR  - http://hdl.handle.net/10044/1/90939
VL  - 5
ER  -
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