We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Recovery of edge states of graphene nanoislands on an iridium substrate by silicon intercalation.
- Authors
Chen, Hui; Que, Yande; Tao, Lei; Zhang, Yu-Yang; Lin, Xiao; Xiao, Wende; Wang, Dongfei; Du, Shixuan; Pantelides, Sokrates T.; Gao, Hong-Jun
- Abstract
Finite-sized graphene sheets, such as graphene nanoislands (GNIs), are promising candidates for practical applications in graphene-based nanoelectronics. GNIs with well-defined zigzag edges are predicted to have spin-polarized edge-states similar to those of zigzag-edged graphene nanoribbons, which can achieve graphene spintronics. However, it has been reported that GNIs on metal substrates have no edge states because of interactions with the substrate.We used a combination of scanning tunneling microscopy, spectroscopy, and density functional theory calculations to demonstrate that the edge states of GNIs on an Ir substrate can be recovered by intercalating a layer of Si atoms between the GNIs and the substrate. We also found that the edge states gradually shift to the Fermi level with increasing island size. This work provides a method to investigate spin-polarized edge states in high-quality graphene nanostructures on a metal substrate.<graphic></graphic>
- Publication
Nano Research, 2018, Vol 11, Issue 7, p3722
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-017-1940-5