Spatial fluctuations in barrier height at the graphene–silicon carbide Schottky junction

S. Rajput, M.X. Chen, Y. Liu, Y.Y. Li, M. Weinert and L. Li ()
Additional contact information
S. Rajput: University of Wisconsin
M.X. Chen: University of Wisconsin
Y. Liu: University of Wisconsin
Y.Y. Li: University of Wisconsin
M. Weinert: University of Wisconsin
L. Li: University of Wisconsin

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract When graphene is interfaced with a semiconductor, a Schottky contact forms with rectifying properties. Graphene, however, is also susceptible to the formation of ripples upon making contact with another material. Here we report intrinsic ripple- and electric field-induced effects at the graphene semiconductor Schottky junction, by comparing chemical vapour-deposited graphene transferred on semiconductor surfaces of opposite polarization—the hydrogen-terminated silicon and carbon faces of hexagonal silicon carbide. Using scanning tunnelling microscopy/spectroscopy and first-principles calculations, we show the formation of a narrow Schottky dipole barrier approximately 10 Å wide, which facilitates the observed effective electric field control of the Schottky barrier height. We further find atomic-scale spatial fluctuations in the Schottky barrier that directly follow the undulation of ripples on both graphene–silicon carbide junctions. These findings reveal fundamental properties of the graphene/semiconductor Schottky junction—a key component of vertical graphene devices that offer functionalities unattainable in planar device architecture.

Date: 2013
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms3752 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3752

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms3752

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().