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Title: High-quality monolayer superconductor NbSe2 grown by chemical vapour deposition
Authors: Wang, Hong
Huang, Xiangwei
Lin, Junhao
Cui, Jian
Chen, Yu
Zhu, Chao
Liu, Fucai
Zeng, Qingsheng
Zhou, Jiadong
Yu, Peng
Wang, Xuewen
He, Haiyong
Tsang, Siu Hon
Gao, Weibo
Suenaga, Kazu
Ma, Fengcai
Yang, Changli
Lu, Li
Yu, Ting
Teo, Edwin Hang Tong
Liu, Guangtong
Liu, Zheng
Keywords: Monolayer Superconductor
Chemical Vapour Deposition
Issue Date: 2017
Source: Wang, H., Huang, X., Lin, J., Cui, J., Chen, Y., Zhu, C., et al. (2017). High-quality monolayer superconductor NbSe2 grown by chemical vapour deposition. Nature Communications, 8(1), 394-.
Series/Report no.: Nature Communications
Abstract: The discovery of monolayer superconductors bears consequences for both fundamental physics and device applications. Currently, the growth of superconducting monolayers can only occur under ultrahigh vacuum and on specific lattice-matched or dangling bond-free substrates, to minimize environment- and substrate-induced disorders/defects. Such severe growth requirements limit the exploration of novel two-dimensional superconductivity and related nanodevices. Here we demonstrate the experimental realization of superconductivity in a chemical vapour deposition grown monolayer material—NbSe2. Atomic-resolution scanning transmission electron microscope imaging reveals the atomic structure of the intrinsic point defects and grain boundaries in monolayer NbSe2, and confirms the low defect concentration in our high-quality film, which is the key to two-dimensional superconductivity. By using monolayer chemical vapour deposited graphene as a protective capping layer, thickness-dependent superconducting properties are observed in as-grown NbSe2 with a transition temperature increasing from 1.0 K in monolayer to 4.56 K in 10-layer.
DOI: 10.1038/s41467-017-00427-5
Rights: © 2017 The Author(s). 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 licenses/by/4.0/
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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