Suppression of conductivity deterioration of copper thin films by coating with atomic-layer materials

Theoretical calculations are performed to explore the electronic structures and electron conducting properties of copper (Cu) thin films coated with graphene or h-boron-nitride (h-BN) layers. The Shockley surface states of Cu surfaces are preserved by the graphene and h-BN coatings which prevent the...

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Bibliographic Details
Published in:Applied physics letters 2017-03, Vol.110 (13)
Main Authors: Cuong, Nguyen Thanh, Okada, Susumu
Format: Article
Language:English
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Summary:Theoretical calculations are performed to explore the electronic structures and electron conducting properties of copper (Cu) thin films coated with graphene or h-boron-nitride (h-BN) layers. The Shockley surface states of Cu surfaces are preserved by the graphene and h-BN coatings which prevent the surface oxidation of Cu because of the weak interaction between the Cu surface and graphene or the h-BN layers. Furthermore, the Shockley surface states in Cu thin films possess quasi-two dimensional free-electron characteristics and exhibit a high conductivity of 1.62 × 107 (Ωm)−1 at room temperature. These hybrid structures may be suitable as interconnects in memory devices that can stably store data for long periods.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4979038