NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles

The structural and electronic properties of twisted bilayer graphene (TBG) on SiC(000[Image: see text]) grown by Si flux-assisted molecular beam epitaxy were investigated using scanning tunneling microscopy (STM) and angle-resolved photoelectron spectroscopy with nanometric spatial resolution. STM i...

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Detalles Bibliográficos
Autores principales: Razado-Colambo, I., Avila, J., Nys, J.-P., Chen, C., Wallart, X., Asensio, M.-C., Vignaud, D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4893698/
https://www.ncbi.nlm.nih.gov/pubmed/27264791
http://dx.doi.org/10.1038/srep27261
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author Razado-Colambo, I.
Avila, J.
Nys, J.-P.
Chen, C.
Wallart, X.
Asensio, M.-C.
Vignaud, D.
author_facet Razado-Colambo, I.
Avila, J.
Nys, J.-P.
Chen, C.
Wallart, X.
Asensio, M.-C.
Vignaud, D.
author_sort Razado-Colambo, I.
collection PubMed
description The structural and electronic properties of twisted bilayer graphene (TBG) on SiC(000[Image: see text]) grown by Si flux-assisted molecular beam epitaxy were investigated using scanning tunneling microscopy (STM) and angle-resolved photoelectron spectroscopy with nanometric spatial resolution. STM images revealed a wide distribution of twist angles between the two graphene layers. The electronic structure recorded in single TBG grains showed two closely-spaced Dirac π bands associated to the two stacked layers with respective twist angles in the range 1–3°. The renormalization of velocity predicted in previous theoretical calculations for small twist angles was not observed.
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spelling pubmed-48936982016-06-10 NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles Razado-Colambo, I. Avila, J. Nys, J.-P. Chen, C. Wallart, X. Asensio, M.-C. Vignaud, D. Sci Rep Article The structural and electronic properties of twisted bilayer graphene (TBG) on SiC(000[Image: see text]) grown by Si flux-assisted molecular beam epitaxy were investigated using scanning tunneling microscopy (STM) and angle-resolved photoelectron spectroscopy with nanometric spatial resolution. STM images revealed a wide distribution of twist angles between the two graphene layers. The electronic structure recorded in single TBG grains showed two closely-spaced Dirac π bands associated to the two stacked layers with respective twist angles in the range 1–3°. The renormalization of velocity predicted in previous theoretical calculations for small twist angles was not observed. Nature Publishing Group 2016-06-06 /pmc/articles/PMC4893698/ /pubmed/27264791 http://dx.doi.org/10.1038/srep27261 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Razado-Colambo, I.
Avila, J.
Nys, J.-P.
Chen, C.
Wallart, X.
Asensio, M.-C.
Vignaud, D.
NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles
title NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles
title_full NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles
title_fullStr NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles
title_full_unstemmed NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles
title_short NanoARPES of twisted bilayer graphene on SiC: absence of velocity renormalization for small angles
title_sort nanoarpes of twisted bilayer graphene on sic: absence of velocity renormalization for small angles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4893698/
https://www.ncbi.nlm.nih.gov/pubmed/27264791
http://dx.doi.org/10.1038/srep27261
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