Cargando…

Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling

We present a combined resonant soft X-ray reflectivity and electric transport study of [Formula: see text] /[Formula: see text]  field effect devices. The depth profiles with atomic layer resolution that are obtained from the resonant reflectivity reveal a pronounced temperature dependence of the tw...

Descripción completa

Detalles Bibliográficos
Autores principales: Zwiebler, M., Di Gennaro, E., Hamann-Borrero, J. E., Ritschel, T., Green, R. J., Sawatzky, G. A., Schierle, E., Weschke, E., Leo, A., Granozio, F. Miletto, Geck, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7591581/
https://www.ncbi.nlm.nih.gov/pubmed/33110119
http://dx.doi.org/10.1038/s41598-020-74364-7
_version_ 1783601026565144576
author Zwiebler, M.
Di Gennaro, E.
Hamann-Borrero, J. E.
Ritschel, T.
Green, R. J.
Sawatzky, G. A.
Schierle, E.
Weschke, E.
Leo, A.
Granozio, F. Miletto
Geck, J.
author_facet Zwiebler, M.
Di Gennaro, E.
Hamann-Borrero, J. E.
Ritschel, T.
Green, R. J.
Sawatzky, G. A.
Schierle, E.
Weschke, E.
Leo, A.
Granozio, F. Miletto
Geck, J.
author_sort Zwiebler, M.
collection PubMed
description We present a combined resonant soft X-ray reflectivity and electric transport study of [Formula: see text] /[Formula: see text]  field effect devices. The depth profiles with atomic layer resolution that are obtained from the resonant reflectivity reveal a pronounced temperature dependence of the two-dimensional electron liquid at the [Formula: see text] /[Formula: see text]  interface. At room temperature the corresponding electrons are located close to the interface, extending down to 4 unit cells into the [Formula: see text]  substrate. Upon cooling, however, these interface electrons assume a bimodal depth distribution: They spread out deeper into the [Formula: see text]  and split into two distinct parts, namely one close to the interface with a thickness of about 4 unit cells and another centered around 9 unit cells from the interface. The results are consistent with theoretical predictions based on oxygen vacancies at the surface of the [Formula: see text]  film and support the notion of a complex interplay between structural and electronic degrees of freedom.
format Online
Article
Text
id pubmed-7591581
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-75915812020-10-28 Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling Zwiebler, M. Di Gennaro, E. Hamann-Borrero, J. E. Ritschel, T. Green, R. J. Sawatzky, G. A. Schierle, E. Weschke, E. Leo, A. Granozio, F. Miletto Geck, J. Sci Rep Article We present a combined resonant soft X-ray reflectivity and electric transport study of [Formula: see text] /[Formula: see text]  field effect devices. The depth profiles with atomic layer resolution that are obtained from the resonant reflectivity reveal a pronounced temperature dependence of the two-dimensional electron liquid at the [Formula: see text] /[Formula: see text]  interface. At room temperature the corresponding electrons are located close to the interface, extending down to 4 unit cells into the [Formula: see text]  substrate. Upon cooling, however, these interface electrons assume a bimodal depth distribution: They spread out deeper into the [Formula: see text]  and split into two distinct parts, namely one close to the interface with a thickness of about 4 unit cells and another centered around 9 unit cells from the interface. The results are consistent with theoretical predictions based on oxygen vacancies at the surface of the [Formula: see text]  film and support the notion of a complex interplay between structural and electronic degrees of freedom. Nature Publishing Group UK 2020-10-27 /pmc/articles/PMC7591581/ /pubmed/33110119 http://dx.doi.org/10.1038/s41598-020-74364-7 Text en © The Author(s) 2020 Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zwiebler, M.
Di Gennaro, E.
Hamann-Borrero, J. E.
Ritschel, T.
Green, R. J.
Sawatzky, G. A.
Schierle, E.
Weschke, E.
Leo, A.
Granozio, F. Miletto
Geck, J.
Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling
title Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling
title_full Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling
title_fullStr Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling
title_full_unstemmed Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling
title_short Transition from a uni- to a bimodal interfacial charge distribution in [Formula: see text] /[Formula: see text] upon cooling
title_sort transition from a uni- to a bimodal interfacial charge distribution in [formula: see text] /[formula: see text] upon cooling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7591581/
https://www.ncbi.nlm.nih.gov/pubmed/33110119
http://dx.doi.org/10.1038/s41598-020-74364-7
work_keys_str_mv AT zwieblerm transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT digennaroe transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT hamannborreroje transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT ritschelt transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT greenrj transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT sawatzkyga transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT schierlee transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT weschkee transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT leoa transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT granoziofmiletto transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling
AT geckj transitionfromaunitoabimodalinterfacialchargedistributioninformulaseetextformulaseetextuponcooling