English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Short Versus Long Range Exchange Interactions in Twisted Bilayer Graphene

Jimeno-Pozo, A., Goodwin, Z. A. H., Pantaleón, P. A., Vitale, V., Klebl, L., Kennes, D. M., et al. (2023). Short Versus Long Range Exchange Interactions in Twisted Bilayer Graphene. Advanced Physics Research, 2(12): 2300048. doi:10.1002/apxr.202300048.

Item is

Files

show Files
hide Files
:
Advanced Physics Research - 2023 - Jimeno‐Pozo - Short Versus Long Range Exchange Interactions in Twisted Bilayer Graphene.pdf (Publisher version), 3MB
Name:
Advanced Physics Research - 2023 - Jimeno‐Pozo - Short Versus Long Range Exchange Interactions in Twisted Bilayer Graphene.pdf
Description:
-
OA-Status:
Gold
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2023
Copyright Info:
© The Authors. Advanced Physics Research published by Wiley-VCH GmbH

Locators

show
hide
Locator:
https://arxiv.org/abs/2303.18025 (Preprint)
Description:
-
OA-Status:
Not specified
Locator:
https://doi.org/10.1002/apxr.202300048 (Publisher version)
Description:
-
OA-Status:
Gold

Creators

show
hide
 Creators:
Jimeno-Pozo, A.1, Author
Goodwin, Z. A. H.2, 3, Author
Pantaleón, P. A.1, Author
Vitale, V.2, 4, Author
Klebl, L.5, Author
Kennes, D. M.6, 7, 8, Author           
Mostofi, A.2, Author
Lischner, J.2, Author
Guinea, F.1, 9, Author
Affiliations:
1Imdea Nanoscience, ou_persistent22              
2Departments of Physics and Materials and the Thomas Young Centre for Theory and Simulation of Materials, Imperial College London, ou_persistent22              
3John A. Paulson School of Engineering and Applied Sciences, Harvard University, ou_persistent22              
4Dipartimento di Fisica, Università di Trieste, ou_persistent22              
5I. Institute of Theoretical Physics, University of Hamburg, ou_persistent22              
6Institute for Theory of Statistical Physics, RWTH Aachen University, and JARA Fundamentals of Future Information Technology, ou_persistent22              
7Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
8Center for Free-Electron Laser Science, ou_persistent22              
9Donostia International Physics Center, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: This study discusses the effect of long-range interactions within the self-consistent Hartree-Fock (HF) approximation in comparison to short-range atomic Hubbard interactions on the band structure of twisted bilayer graphene (TBG) at charge neutrality for various twist angles. Starting from atomistic calculations, it determines the quasi-particle band structure of TBG with Hubbard interactions for three magnetic orderings: modulated anti-ferromagnetic (MAFM), (NAFM) and hexagonal anti-ferromagnetic (HAFM). Then, it develops an approach to incorporate these magnetic orderings along with the HF potential in the continuum approximation. Away from the magic angle, it observes a drastic effect of the magnetic order on the band structure of TBG compared to the influence of the HF potential. Near the magic angle, the HF potential plays a major role in the band structure, with HAFM and MAFM being secondary effects, but NAFM appears to still significantly distort the electronic structure at the magic angle. These findings suggest that the spin-valley degenerate broken symmetry state often found in HF calculations of charge neutral TBG near the magic angle should favor magnetic order, since the atomistic Hubbard interaction will break this symmetry in favor of spin polarization.

Details

show
hide
Language(s): eng - English
 Dates: 2023-07-202023-05-052023-12
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2303.18025
DOI: 10.1002/apxr.202300048
 Degree: -

Event

show

Legal Case

show

Project information

show hide
Project name : -
Grant ID : 101067977
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : A.J.P., P.A.P., and F.G. acknowledge support from the Severo Ochoa programme for centres of excellence in R&D (Grant no. SEV-2016-0686, Ministerio de Ciencia e Innovación, Spain); from the European Commission, within the Graphene Flagship, Core 3, grant number 881603 and from grants NMAT2D (Comunidad de Madrid, Spain) and SprQuMat (Ministerio de Ciencia e Innovación, Spain). ZG was supported through a studentship in the Centre for Doctoral Training on Theory and Simulation of Materials at Imperial College London funded by the EPSRC (EP/L015579/1). The authors acknowledge funding from EPSRC grant EP/S025324/1 and the Thomas Young Centre under grant number TYC-101. The authors acknowledge the Imperial College London Research Computing Service (DOI:10.14469/hpc/2232) for the computational resources used in carrying out this work. This project had received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 101067977. The Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) was acknowledged for support through RTG 1995, within the Priority Program SPP 2244 “2DMP” - 443273985 and under Germany's Excellence Strategy-Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) EXC2004/1 - 390534769. The authors acknowledge support from the Max Planck-New York City Center for Non-Equilibrium Quantum Phenomena. Spin susceptibility calculations were performed with computing resources granted by the RWTH Aachen University under projects rwth0496 and rwth0589.
Grant ID : -
Funding program : -
Funding organization : -

Source 1

show
hide
Title: Advanced Physics Research
  Abbreviation : Adv. Physics Res.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Wiley
Pages: - Volume / Issue: 2 (12) Sequence Number: 2300048 Start / End Page: - Identifier: ISSN: 2751-1200
CoNE: https://pure.mpg.de/cone/journals/resource/2751-1200