Selenium capped monolayer NbSe2 for two-dimensional superconductivity studies

Superconductivity in monolayer niobium diselenide (NbSe2) on bilayer graphene is studied by electrical transport. Monolayer NbSe2 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 TC = 1.9 K. In situ m...

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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:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
in situ
molecular beam epitaxy
monolayer niobium diselenide
superconductivity
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Summary:Superconductivity in monolayer niobium diselenide (NbSe2) on bilayer graphene is studied by electrical transport. Monolayer NbSe2 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 TC = 1.9 K. In situ measurements down to 4 K 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 NbSe2/bilayer graphene with selenium capping layer and electrical contacts.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201600235