Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges

Author(s)
Xue, Jiamin; Watanabe, K.; Taniguchi, T.; LeRoy, Brian J.; Sanchez-Yamagishi, Javier D.; ... Show more
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Abstract
Using scanning tunneling microscopy and spectroscopy, we have studied the local density of states (LDOS) of graphene over step edges in boron nitride. Long-wavelength oscillations in the LDOS are observed with maxima parallel to the step edge. Their wavelength and amplitude are controlled by the energy of the quasiparticles allowing a direct probe of the graphene dispersion relation. We also observe a faster decay of the LDOS oscillations away from the step edge than in conventional metals. This is due to the chiral nature of the Dirac fermions in graphene.
Date issued
2012-01
URI
http://hdl.handle.net/1721.1/69608
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Xue, Jiamin et al. “Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges.” Physical Review Letters 108.1 (2012): n. pag. Web. 8 Mar. 2012. © 2012 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114
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