Landau level splitting in nitrogen-seeded epitaxial graphene

S. L. Rothwell; F. Wang; G. Liu; C. Xu; L. C. Feldman; E. H. Conrad; N. P. Guisinger; P. I. Cohen

doi:10.1016/j.carbon.2016.02.100

Landau level splitting in nitrogen-seeded epitaxial graphene

S. L. Rothwell, F. Wang, G. Liu, C. Xu, L. C. Feldman, E. H. Conrad, N. P. Guisinger, P. I. Cohen

Rutgers University

Research output: Contribution to journal › Article

Abstract

We report scanning tunneling microscopy and spectroscopy (STM and STS) studies of graphene formed from a nitrogen-seeded SiC(0001¯) surface. STM indicates that much of the graphene consists of wide flat plateaus with hexagonal features bounded by pleats and regions with disordered character. Nitrogen impurities are not observed in the epitaxial graphene layers. STS measurements on this surface show peaks corresponding to Landau levels associated with pseudo-magnetic fields as high as 1000 T. The energy distribution of Landau levels is consistent with an electronic model employing a finite bandgap.

Original language	English
Pages (from-to)	299-304
Number of pages	6
Journal	Carbon
Volume	103
DOIs	https://doi.org/10.1016/j.carbon.2016.02.100
Publication status	Published - Jul 1 2016

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ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)

Cite this

Rothwell, S. L., Wang, F., Liu, G., Xu, C., Feldman, L. C., Conrad, E. H., Guisinger, N. P., & Cohen, P. I. (2016). Landau level splitting in nitrogen-seeded epitaxial graphene. Carbon, 103, 299-304. https://doi.org/10.1016/j.carbon.2016.02.100

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AU - Rothwell, S. L.

AU - Wang, F.

AU - Liu, G.

AU - Xu, C.

AU - Feldman, L. C.

AU - Conrad, E. H.

AU - Guisinger, N. P.

AU - Cohen, P. I.

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AB - We report scanning tunneling microscopy and spectroscopy (STM and STS) studies of graphene formed from a nitrogen-seeded SiC(0001¯) surface. STM indicates that much of the graphene consists of wide flat plateaus with hexagonal features bounded by pleats and regions with disordered character. Nitrogen impurities are not observed in the epitaxial graphene layers. STS measurements on this surface show peaks corresponding to Landau levels associated with pseudo-magnetic fields as high as 1000 T. The energy distribution of Landau levels is consistent with an electronic model employing a finite bandgap.

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10.1016/j.carbon.2016.02.100