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{Klebl:2021:10.1103/physrevb.103.195127,
author = {Klebl, L and Goodwin, Z and Mostofi, AA and Kennes, DM and Lischner, J},
doi = {10.1103/physrevb.103.195127},
journal = {Physical Review B},
pages = {1--7},
title = {Importance of long-ranged electron-electron interactions for the magnetic phase diagram of twisted bilayer graphene},
url = {http://dx.doi.org/10.1103/physrevb.103.195127},
volume = {103},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Electron-electron interactions are intrinsically long ranged, but many models of strongly interacting electrons only take short-ranged interactions into account. Here, we present results of atomistic calculations including both long-ranged and short-ranged electron-electron interactions for the magnetic phase diagram of twisted bilayer graphene and demonstrate that qualitatively different results are obtained when long-ranged interactions are neglected. In particular, we use Hartree theory augmented with Hubbard interactions and calculate the interacting spin susceptibility at a range of doping levels and twist angles near the first magic angle to identify the dominant magnetic instabilities. At the magic angle, mostly antiferromagnetic order is found, while ferromagnetism dominates at other twist angles. Moreover, long-ranged interactions significantly increase the twist angle window in which strong correlation phenomena can be expected. These findings are in good agreement with available experimental data.
AU  - Klebl,L
AU  - Goodwin,Z
AU  - Mostofi,AA
AU  - Kennes,DM
AU  - Lischner,J
DO  - 10.1103/physrevb.103.195127
EP  - 7
PY  - 2021///
SN  - 2469-9950
SP  - 1
TI  - Importance of long-ranged electron-electron interactions for the magnetic phase diagram of twisted bilayer graphene
T2  - Physical Review B
UR  - http://dx.doi.org/10.1103/physrevb.103.195127
UR  - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.103.195127
UR  - http://hdl.handle.net/10044/1/88737
VL  - 103
ER  -
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