Quality Heterostructures from Two-Dimensional Crystals Unstable in Air by Their Assembly in Inert Atmosphere
Yang Cao,Artem Mishchenko,Geliang Yu,Ekaterina Khestanova,A. P. Rooney,Eric Prestat,Andrey V. Kretinin,Peter Blake,Moshe Ben Shalom,Colin R. Woods,J. Chapman,Geetha Balakrishnan,Irina V. Grigorieva,Konstantin S. Novoselov,Benjamin A. Piot,Marek Potemski,Kenji Watanabe,T. Taniguchi,Sarah J. Haigh,Andre K. Geim,Roman V. Gorbachev +20 more
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TLDR
A remedial approach based on cleavage, transfer, alignment, and encapsulation of air-sensitive crystals, all inside a controlled inert atmosphere, which offers a venue to significantly expand the range of experimentally accessible two-dimensional crystals and their heterostructures.Abstract:
Many layered materials can be cleaved down to individual atomic planes, similar to graphene, but only a small minority of them are stable under ambient conditions. The rest react and decompose in air, which has severely hindered their investigation and potential applications. Here we introduce a remedial approach based on cleavage, transfer, alignment, and encapsulation of air-sensitive crystals, all inside a controlled inert atmosphere. To illustrate the technology, we choose two archetypal two-dimensional crystals that are of intense scientific interest but are unstable in air: black phosphorus and niobium diselenide. Our field-effect devices made from their monolayers are conductive and fully stable under ambient conditions, which is in contrast to the counterparts processed in air. NbSe2 remains superconducting down to the monolayer thickness. Starting with a trilayer, phosphorene devices reach sufficiently high mobilities to exhibit Landau quantization. The approach offers a venue to significantly ex...read more
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Recent Advances in 2D Superconductors.
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EuSn2As2: an exfoliatable magnetic layered Zintl–Klemm phase
Maxx Q. Arguilla,Nicholas D. Cultrara,Zachary J. Baum,Shishi Jiang,R. D. Ross,Joshua E. Goldberger +5 more
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Suppression of the Charge Density Wave State in Two-Dimensional 1T-TiSe2 by Atmospheric Oxidation.
Lifei Sun,Chuanhui Chen,Qinghua Zhang,C. Sohrt,Tianqi Zhao,Guanchen Xu,Jinghui Wang,Dong Wang,Kai Rossnagel,Lin Gu,Chenggang Tao,Liying Jiao +11 more
TL;DR: This work comprehensively investigates the oxidation process of 2D TiSe2 by tracking the evolution of the chemical composition and atomic structure with various microscopic and spectroscopic techniques and reveals its unique selenium-assisting oxidation mechanism.
Journal ArticleDOI
Visualization of multifractal superconductivity in a two-dimensional transition metal dichalcogenide in the weak-disorder regime
Carmen Rubio-Verdú,Antonio M. García-García,Hyejin Ryu,Deung-Jang Choi,Javier Zaldívar,Shujie Tang,Shujie Tang,Bo Fan,Zhi-Xun Shen,Zhi-Xun Shen,Sung-Kwan Mo,Jose Ignacio Pascual,Miguel M. Ugeda +12 more
TL;DR: In this paper, the authors provided evidence for multifractal features in the superconducting state of an intrinsic, weakly disordered single-layer NbSe2 by means of low-temperature scanning tunneling microscopy/spectroscopy.
Journal ArticleDOI
Electronic structure of $2H$-NbSe$_2$ single-layers in the CDW state
TL;DR: In this article, a density functional theory study of NbSe$_2$ single-layers in the normal non-modulated and the $3\times3$ CDW states is reported.
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