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Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3)
Superconductivity is significantly enhanced in monolayer FeSe grown on SrTiO(3), but not for multilayer films, in which large strength of nematicity develops. However, the link between the high-transition temperature superconductivity in monolayer and the correlation related nematicity in multilayer...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8044195/ https://www.ncbi.nlm.nih.gov/pubmed/33850158 http://dx.doi.org/10.1038/s41467-021-22516-2 |
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author | Yuan, Yonghao Fan, Xuemin Wang, Xintong He, Ke Zhang, Yan Xue, Qi-Kun Li, Wei |
author_facet | Yuan, Yonghao Fan, Xuemin Wang, Xintong He, Ke Zhang, Yan Xue, Qi-Kun Li, Wei |
author_sort | Yuan, Yonghao |
collection | PubMed |
description | Superconductivity is significantly enhanced in monolayer FeSe grown on SrTiO(3), but not for multilayer films, in which large strength of nematicity develops. However, the link between the high-transition temperature superconductivity in monolayer and the correlation related nematicity in multilayer FeSe films is not well understood. Here, we use low-temperature scanning tunneling microscopy to study few-layer FeSe thin films grown by molecular beam epitaxy. We observe an incommensurate long-range smectic phase, which solely appears in bilayer FeSe films. The smectic order still locally exists and gradually fades away with increasing film thickness, while it suddenly vanishes in monolayer FeSe, indicative of an abrupt smectic phase transition. Surface alkali-metal doping can suppress the smectic phase and induce high-T(c) superconductivity in bilayer FeSe. Our observations provide evidence that the monolayer FeSe is in close proximity to the smectic phase, and its superconductivity is likely enhanced by this electronic instability as well. |
format | Online Article Text |
id | pubmed-8044195 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-80441952021-04-30 Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3) Yuan, Yonghao Fan, Xuemin Wang, Xintong He, Ke Zhang, Yan Xue, Qi-Kun Li, Wei Nat Commun Article Superconductivity is significantly enhanced in monolayer FeSe grown on SrTiO(3), but not for multilayer films, in which large strength of nematicity develops. However, the link between the high-transition temperature superconductivity in monolayer and the correlation related nematicity in multilayer FeSe films is not well understood. Here, we use low-temperature scanning tunneling microscopy to study few-layer FeSe thin films grown by molecular beam epitaxy. We observe an incommensurate long-range smectic phase, which solely appears in bilayer FeSe films. The smectic order still locally exists and gradually fades away with increasing film thickness, while it suddenly vanishes in monolayer FeSe, indicative of an abrupt smectic phase transition. Surface alkali-metal doping can suppress the smectic phase and induce high-T(c) superconductivity in bilayer FeSe. Our observations provide evidence that the monolayer FeSe is in close proximity to the smectic phase, and its superconductivity is likely enhanced by this electronic instability as well. Nature Publishing Group UK 2021-04-13 /pmc/articles/PMC8044195/ /pubmed/33850158 http://dx.doi.org/10.1038/s41467-021-22516-2 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Yuan, Yonghao Fan, Xuemin Wang, Xintong He, Ke Zhang, Yan Xue, Qi-Kun Li, Wei Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3) |
title | Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3) |
title_full | Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3) |
title_fullStr | Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3) |
title_full_unstemmed | Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3) |
title_short | Incommensurate smectic phase in close proximity to the high-T(c) superconductor FeSe/SrTiO(3) |
title_sort | incommensurate smectic phase in close proximity to the high-t(c) superconductor fese/srtio(3) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8044195/ https://www.ncbi.nlm.nih.gov/pubmed/33850158 http://dx.doi.org/10.1038/s41467-021-22516-2 |
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