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Proximity Effects on the Charge Density Wave Order and Superconductivity in Single-Layer NbSe(2)
[Image: see text] Collective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting such electronic states are largely exposed...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8717633/ https://www.ncbi.nlm.nih.gov/pubmed/34846856 http://dx.doi.org/10.1021/acsnano.1c06012 |
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author | Dreher, Paul Wan, Wen Chikina, Alla Bianchi, Marco Guo, Haojie Harsh, Rishav Mañas-Valero, Samuel Coronado, Eugenio Martínez-Galera, Antonio J. Hofmann, Philip Miwa, Jill A. Ugeda, Miguel M. |
author_facet | Dreher, Paul Wan, Wen Chikina, Alla Bianchi, Marco Guo, Haojie Harsh, Rishav Mañas-Valero, Samuel Coronado, Eugenio Martínez-Galera, Antonio J. Hofmann, Philip Miwa, Jill A. Ugeda, Miguel M. |
author_sort | Dreher, Paul |
collection | PubMed |
description | [Image: see text] Collective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting such electronic states are largely exposed to the environment. In this regard, the ineludible presence of supporting substrates triggers various proximity effects on 2D materials that may ultimately compromise the stability and properties of the electronic ground state. In this work, we investigate the impact of proximity effects on the CDW and superconducting states in single-layer (SL) NbSe(2) on four substrates of diverse nature, namely, bilayer graphene (BLG), SL-boron nitride (h-BN), Au(111), and bulk WSe(2). By combining low-temperature (340 mK) scanning tunneling microscopy/spectroscopy and angle-resolved photoemission spectroscopy, we compare the electronic structure of this prototypical 2D superconductor on each substrate. We find that, even when the electronic band structure of SL-NbSe(2) remains largely unaffected by the substrate except when placed on Au(111), where a charge transfer occurs, both the CDW and SC show disparate behaviors. On the insulating h-BN/Ir(111) substrate and the metallic BLG/SiC(0001) substrate, both the 3 × 3 CDW and superconducting phases persist in SL-NbSe(2) with very similar properties, which reveals the negligible impact of graphene on these electronic phases. In contrast, these collective electronic phases are severely weakened and even absent on the bulk insulating WSe(2) substrate and the metallic single-crystal Au(111) substrate. Our results provide valuable insights into the fragile stability of such electronic ground states in 2D materials. |
format | Online Article Text |
id | pubmed-8717633 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-87176332021-12-30 Proximity Effects on the Charge Density Wave Order and Superconductivity in Single-Layer NbSe(2) Dreher, Paul Wan, Wen Chikina, Alla Bianchi, Marco Guo, Haojie Harsh, Rishav Mañas-Valero, Samuel Coronado, Eugenio Martínez-Galera, Antonio J. Hofmann, Philip Miwa, Jill A. Ugeda, Miguel M. ACS Nano [Image: see text] Collective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting such electronic states are largely exposed to the environment. In this regard, the ineludible presence of supporting substrates triggers various proximity effects on 2D materials that may ultimately compromise the stability and properties of the electronic ground state. In this work, we investigate the impact of proximity effects on the CDW and superconducting states in single-layer (SL) NbSe(2) on four substrates of diverse nature, namely, bilayer graphene (BLG), SL-boron nitride (h-BN), Au(111), and bulk WSe(2). By combining low-temperature (340 mK) scanning tunneling microscopy/spectroscopy and angle-resolved photoemission spectroscopy, we compare the electronic structure of this prototypical 2D superconductor on each substrate. We find that, even when the electronic band structure of SL-NbSe(2) remains largely unaffected by the substrate except when placed on Au(111), where a charge transfer occurs, both the CDW and SC show disparate behaviors. On the insulating h-BN/Ir(111) substrate and the metallic BLG/SiC(0001) substrate, both the 3 × 3 CDW and superconducting phases persist in SL-NbSe(2) with very similar properties, which reveals the negligible impact of graphene on these electronic phases. In contrast, these collective electronic phases are severely weakened and even absent on the bulk insulating WSe(2) substrate and the metallic single-crystal Au(111) substrate. Our results provide valuable insights into the fragile stability of such electronic ground states in 2D materials. American Chemical Society 2021-11-30 2021-12-28 /pmc/articles/PMC8717633/ /pubmed/34846856 http://dx.doi.org/10.1021/acsnano.1c06012 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Dreher, Paul Wan, Wen Chikina, Alla Bianchi, Marco Guo, Haojie Harsh, Rishav Mañas-Valero, Samuel Coronado, Eugenio Martínez-Galera, Antonio J. Hofmann, Philip Miwa, Jill A. Ugeda, Miguel M. Proximity Effects on the Charge Density Wave Order and Superconductivity in Single-Layer NbSe(2) |
title | Proximity
Effects on the Charge Density Wave Order
and Superconductivity in Single-Layer NbSe(2) |
title_full | Proximity
Effects on the Charge Density Wave Order
and Superconductivity in Single-Layer NbSe(2) |
title_fullStr | Proximity
Effects on the Charge Density Wave Order
and Superconductivity in Single-Layer NbSe(2) |
title_full_unstemmed | Proximity
Effects on the Charge Density Wave Order
and Superconductivity in Single-Layer NbSe(2) |
title_short | Proximity
Effects on the Charge Density Wave Order
and Superconductivity in Single-Layer NbSe(2) |
title_sort | proximity
effects on the charge density wave order
and superconductivity in single-layer nbse(2) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8717633/ https://www.ncbi.nlm.nih.gov/pubmed/34846856 http://dx.doi.org/10.1021/acsnano.1c06012 |
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