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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Journal ArticleDOI
Observation of Superconducting Collective Modes from Competing Pairing Instabilities in Single‐Layer NbSe <sub>2</sub>
TL;DR: In this article , the existence of a soft collective mode in single-layer NbSe2 , observed as a characteristic resonance excitation in high-resolution tunneling spectra is reported.
Posted ContentDOI
Photonic Devices Based On Black-Phosphorus and Combined Hybrid 2D nanomaterials
Leonardo Viti,Miriam S. Vitiello +1 more
TL;DR: A review of the latest achievements in black phosphorus-based THz photonics and discuss future perspectives of this rapidly developing research field can be found in this article, where a new generation of high-performance photonic devices that could be engineered from scratch like transparent saturable absorbers, fast photocounductive switch and low noise photodetectors, exploiting its peculiar electrical, thermal and optical anisotropy.
Posted Content
Hall micromagnetometry of individual two-dimensional ferromagnets
Minsoo Kim,Piranavan Kumaravadivel,John Birkbeck,Wenjun Kuang,Shuigang Xu,David G. Hopkinson,Johannes Knolle,Paul McClarty,A. I. Berdyugin,Moshe Ben Shalom,Roman V. Gorbachev,Sarah J. Haigh,Song Liu,James H. Edgar,Kostya S. Novoselov,Irina V. Grigorieva,A. K. Geim +16 more
TL;DR: In this article, a multilayer van der Waals (vdW) heterostructures comprising of an atomically-thin ferromagnetic crystal placed on top of a Hall bar made from encapsulated graphene was used for the quantitative analysis of magnetization and its behavior in atomically thin CrBr3.
Journal ArticleDOI
Two-dimensional Superconductivity from Dimerization of Atomically Ordered AuTe2Se4/3 Cubes
Jiangang Guo,Xu Chen,X. Y. Jia,Qinghua Zhang,Ning Liu,Hechang Lei,Shiyan Li,Lin Gu,Shifeng Jin,Xuliang Chen +9 more
TL;DR: In this article, the authors reported the 2D superconductivity in bulky AuTe2Se4/3, where the reduction in dimensionality is achieved through inducing the elongated covalent Te-Te bonds.
Dissertation
Electron beam processing and spectroscopic characterisation of 2D materials and novel nanostructures
TL;DR: In this article, a focused electron beam induced processing (FEBIP) is used to decompose surface adsorbed precursor molecules, typically under a constant partial pressure of a precursor gas.
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