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Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene
We show that Cs intercalated bilayer graphene acts as a substrate for the growth of a strained Cs film hosting quantum well states with high electronic quality. The Cs film grows in an fcc phase with a substantially reduced lattice constant of 4.9 Å corresponding to a compressive strain of 11% compa...
Autores principales: | , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7067783/ https://www.ncbi.nlm.nih.gov/pubmed/32165617 http://dx.doi.org/10.1038/s41467-020-15130-1 |
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author | Hell, Martin Ehlen, Niels Marini, Giovanni Falke, Yannic Senkovskiy, Boris V. Herbig, Charlotte Teichert, Christian Jolie, Wouter Michely, Thomas Avila, Jose Santo, Giovanni Di Torre, Diego M. de la Petaccia, Luca Profeta, Gianni Grüneis, Alexander |
author_facet | Hell, Martin Ehlen, Niels Marini, Giovanni Falke, Yannic Senkovskiy, Boris V. Herbig, Charlotte Teichert, Christian Jolie, Wouter Michely, Thomas Avila, Jose Santo, Giovanni Di Torre, Diego M. de la Petaccia, Luca Profeta, Gianni Grüneis, Alexander |
author_sort | Hell, Martin |
collection | PubMed |
description | We show that Cs intercalated bilayer graphene acts as a substrate for the growth of a strained Cs film hosting quantum well states with high electronic quality. The Cs film grows in an fcc phase with a substantially reduced lattice constant of 4.9 Å corresponding to a compressive strain of 11% compared to bulk Cs. We investigate its electronic structure using angle-resolved photoemission spectroscopy and show the coexistence of massless Dirac and massive Schrödinger charge carriers in two dimensions. Analysis of the electronic self-energy of the massive charge carriers reveals the crystallographic direction in which a two-dimensional Fermi gas is realized. Our work introduces the growth of strained metal quantum wells on intercalated Dirac matter. |
format | Online Article Text |
id | pubmed-7067783 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-70677832020-03-18 Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene Hell, Martin Ehlen, Niels Marini, Giovanni Falke, Yannic Senkovskiy, Boris V. Herbig, Charlotte Teichert, Christian Jolie, Wouter Michely, Thomas Avila, Jose Santo, Giovanni Di Torre, Diego M. de la Petaccia, Luca Profeta, Gianni Grüneis, Alexander Nat Commun Article We show that Cs intercalated bilayer graphene acts as a substrate for the growth of a strained Cs film hosting quantum well states with high electronic quality. The Cs film grows in an fcc phase with a substantially reduced lattice constant of 4.9 Å corresponding to a compressive strain of 11% compared to bulk Cs. We investigate its electronic structure using angle-resolved photoemission spectroscopy and show the coexistence of massless Dirac and massive Schrödinger charge carriers in two dimensions. Analysis of the electronic self-energy of the massive charge carriers reveals the crystallographic direction in which a two-dimensional Fermi gas is realized. Our work introduces the growth of strained metal quantum wells on intercalated Dirac matter. Nature Publishing Group UK 2020-03-12 /pmc/articles/PMC7067783/ /pubmed/32165617 http://dx.doi.org/10.1038/s41467-020-15130-1 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Hell, Martin Ehlen, Niels Marini, Giovanni Falke, Yannic Senkovskiy, Boris V. Herbig, Charlotte Teichert, Christian Jolie, Wouter Michely, Thomas Avila, Jose Santo, Giovanni Di Torre, Diego M. de la Petaccia, Luca Profeta, Gianni Grüneis, Alexander Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene |
title | Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene |
title_full | Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene |
title_fullStr | Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene |
title_full_unstemmed | Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene |
title_short | Massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene |
title_sort | massive and massless charge carriers in an epitaxially strained alkali metal quantum well on graphene |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7067783/ https://www.ncbi.nlm.nih.gov/pubmed/32165617 http://dx.doi.org/10.1038/s41467-020-15130-1 |
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