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
Monte Carlo study of carrier transport in two-dimensional transition metal dichalcogenides: high-field characteristics and MOSFET simulation
Journal ArticleDOI
Hexagonal Boron Nitride Nanosheets Protect Exfoliated Black Phosphorus Layers from Ambient Oxidation
Cora Bartus Pravda,Tímea Hegedűs,Eliezer Fernando Oliveira,Dániel Berkesi,Ákos Szamosvölgyi,Zoltán Kónya,Robert Vajtai,Ákos Kukovecz +7 more
TL;DR: In this article , a drop-casting hexagonal boron nitride (h−BN) nanosheets on phosphorene was proposed to prevent spontaneous oxidation of 2D materials.
Journal ArticleDOI
Identification of Ubiquitously Present Polymeric Adlayers on 2D Transition Metal Dichalcogenides
Rita Tilmann,Cian Bartlam,Oliver Hartwig,Bartlomiej Tywoniuk,Nikolas Dominik,Conor P. Cullen,Lisanne Peters,Tanja Stimpel-Lindner,Niall McEvoy,Georg S. Duesberg +9 more
TL;DR: In this article , the ubiquitous presence of polymeric adlayers on top of layered transition metal dichalcogenides (TMDs) is reported, which can be identified with highly resolved time-of-flight secondary ion mass spectrometry (TOF-SIMS).
Dissertation
Fabrication and characterisation of air-sensitive InSe based heterostructure devices
TL;DR: In this paper, a methodology is established using the inert argon environment of a glovebox to fabricate and characterise various air-sensitive materials using optical and charge transport measurements.
Journal ArticleDOI
Visualization of Macroscopic Ising Superconducting State in Superconductor‐Graphene Junctions
Yao Chen,Yu-Yang Zhang,Zeping Huang,Liangguang Jia,Liwei Liu,Huixia Yang,Teng Zhang,Lin He,Yuan Huang,Haiwen Liu,Yeliang Wang +10 more
TL;DR: In this article , a scanning tunneling microscopy study of Ising superconductivity in single-layer (SL) NbSe2 island and its long-range proximity effect to the adjacent graphene with high spatial and energy resolution is reported.
References
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TL;DR: In this paper, the 2D counterpart of layered black phosphorus, which is called phosphorene, is introduced as an unexplored p-type semiconducting material and the authors find that the band gap is direct, depends on the number of layers and the in-layer strain, and significantly larger than the bulk value of 0.31-0.36 eV.