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Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas
Fundamental interest for 2D electron gas (2DEG) systems has been recently renewed with the advent of 2D materials and their potential high-impact applications in optoelectronics. Here, we investigate a 2DEG created by the electron transfer from a Ag adatom gas deposited on a Si(111) [Formula: see te...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5587567/ https://www.ncbi.nlm.nih.gov/pubmed/28878360 http://dx.doi.org/10.1038/s41598-017-10300-6 |
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author | Cheynis, F. Curiotto, S. Leroy, F. Müller, P. |
author_facet | Cheynis, F. Curiotto, S. Leroy, F. Müller, P. |
author_sort | Cheynis, F. |
collection | PubMed |
description | Fundamental interest for 2D electron gas (2DEG) systems has been recently renewed with the advent of 2D materials and their potential high-impact applications in optoelectronics. Here, we investigate a 2DEG created by the electron transfer from a Ag adatom gas deposited on a Si(111) [Formula: see text] -Ag surface to an electronic surface state. Using low-energy electron microscopy (LEEM), we measure the Ag adatom gas concentration and the 2DEG-induced charge transfer. We demonstrate a linear dependence of the surface work function change on the Ag adatom gas concentration. A breakdown of the linear relationship is induced by the occurrence of the Ag adatom gas superstructure identified as Si(111) [Formula: see text] -Ag only observed below room temperature. We evidence below room temperature a confinement of the 2DEG on atomic terraces characterised by spatial inhomogeneities of the 2DEG-induced charge transfer along with temporal fluctuations. These variations mirror the Ag adatom gas concentration changes induced by the growth of 3D Ag islands and the occurrence of an Ehrlich-Schwoebel diffusion barrier of 155 ± 10 meV. |
format | Online Article Text |
id | pubmed-5587567 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-55875672017-09-13 Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas Cheynis, F. Curiotto, S. Leroy, F. Müller, P. Sci Rep Article Fundamental interest for 2D electron gas (2DEG) systems has been recently renewed with the advent of 2D materials and their potential high-impact applications in optoelectronics. Here, we investigate a 2DEG created by the electron transfer from a Ag adatom gas deposited on a Si(111) [Formula: see text] -Ag surface to an electronic surface state. Using low-energy electron microscopy (LEEM), we measure the Ag adatom gas concentration and the 2DEG-induced charge transfer. We demonstrate a linear dependence of the surface work function change on the Ag adatom gas concentration. A breakdown of the linear relationship is induced by the occurrence of the Ag adatom gas superstructure identified as Si(111) [Formula: see text] -Ag only observed below room temperature. We evidence below room temperature a confinement of the 2DEG on atomic terraces characterised by spatial inhomogeneities of the 2DEG-induced charge transfer along with temporal fluctuations. These variations mirror the Ag adatom gas concentration changes induced by the growth of 3D Ag islands and the occurrence of an Ehrlich-Schwoebel diffusion barrier of 155 ± 10 meV. Nature Publishing Group UK 2017-09-06 /pmc/articles/PMC5587567/ /pubmed/28878360 http://dx.doi.org/10.1038/s41598-017-10300-6 Text en © The Author(s) 2017 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 Cheynis, F. Curiotto, S. Leroy, F. Müller, P. Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas |
title | Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas |
title_full | Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas |
title_fullStr | Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas |
title_full_unstemmed | Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas |
title_short | Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas |
title_sort | spatial inhomogeneity and temporal dynamics of a 2d electron gas in interaction with a 2d adatom gas |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5587567/ https://www.ncbi.nlm.nih.gov/pubmed/28878360 http://dx.doi.org/10.1038/s41598-017-10300-6 |
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