Selenium capped monolayer NbSe sub(2) for two-dimensional superconductivity studies

Superconductivity in monolayer niobium diselenide (NbSe sub(2)) on bilayer graphene is studied by electrical transport. Monolayer NbSe sub(2) is grown on bilayer graphene by molecular beam epitaxy and capped with a selenium film to avoid degradation in air. The selenium capped samples have T sub(C)=...

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Bibliographic Details
Published in:Physica Status Solidi. B: Basic Solid State Physics 2016-12, Vol.253 (12), p.2396-2399
Main Authors: Onishi, Seita, Ugeda, Miguel M, Zhang, Yi, Chen, Yi, Ojeda-Aristizabal, Claudia, Ryu, Hyejin, Mo, Sung-Kwan, Hussain, Zahid, Shen, Zhi-Xun, Crommie, Michael F, Zettl, Alex
Format: Article
Language:English
Subjects:
Capping
Graphene
Monolayers
Selenides
Selenium
Solid state physics
Superconductivity
Transport
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Summary:Superconductivity in monolayer niobium diselenide (NbSe sub(2)) on bilayer graphene is studied by electrical transport. Monolayer NbSe sub(2) is grown on bilayer graphene by molecular beam epitaxy and capped with a selenium film to avoid degradation in air. The selenium capped samples have T sub(C)=1.9K. In situ measurements down to 4K in ultrahigh vacuum show that the effect of the selenium layer on the transport is negligible. The superconducting transition and upper critical fields in air exposed and selenium capped samples are compared. Schematic of monolayer NbSe sub(2)/bilayer graphene with selenium capping layer and electrical contacts.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201600235