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Unexpected Structures for Intercalation of Sodium in Epitaxial Graphene-SiC Interfaces

Description: In this paper, the authors show using scanning tunneling microscopy, spectroscopy, and ab initio calculations that several intercalation structures exist for Na in epitaxial graphene on SiC(0001). Intercalation takes place at room temperature and Na electron-dopes the graphene. It intercalates in-between single-layer graphene and the carbon-rich interfacial layer. It also penetrates beneath the interfacial layer and decouples it to form a second graphene layer. This decoupling is accelerated by annealing and is verified by direct Na deposition onto the interface layer. The authors' observations show that intercalation in graphene is fundamentally different than in graphite and is a versatile means of electronic control.
Date: February 2012
Creator: Sandin, Andreas; Jayasekera, Thushari; Rowe, J. E.; Kim, Ki Wook; Buongiorno Nardelli, Marco & Dougherty, Daniel B.
Item Type: Paper

Comparative Assessment of Peer Review: Project Outcomes Report

Description: This report discusses the Comparative Assessment of Peer Review (CAPR) project outcomes. The authors investigate the review process for agencies that fund scientific research.
Date: January 2013
Creator: Frodeman, Robert; Holbrook, J. Britt; Moen, William E.; Burggren, Warren W. & Mitcham, Carl
Item Type: Report