Journal
NATURE COMMUNICATIONS
Volume 5, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/ncomms6403
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Funding
- Office of Science of the US DOE [DE-AC02-05CH11231]
- NSF [ECCS-1231808]
- DARPA
- Laboratory Directed Research and Development Program of Oak Ridge National Laboratory
- Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy (DOE)
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1231808] Funding Source: National Science Foundation
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Two-dimensional interfaces between crystalline materials have been shown to generate unusual interfacial electronic states in complex oxides. Recently, a one-dimensional interface has been realized in hexagonal boron nitride and graphene planar heterostructures, where a polar-on-nonpolar one-dimensional boundary is expected to possess peculiar electronic states associated with edge states of graphene and the polarity of boron nitride. Here we present a combined scanning tunnelling microscopy and first-principles theory study of the graphene-boron nitride boundary to provide a first glimpse into the spatial and energetic distributions of the one-dimensional boundary states down to atomic resolution. The revealed boundary states are about 0.6 eV below or above the Fermi level depending on the termination of the boron nitride at the boundary, and are extended along but localized at the boundary. These results suggest that unconventional physical effects similar to those observed at two-dimensional interfaces can also exist in lower dimensions.
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