Long-wavelength local density of states oscillations near graphene step edges

Jiamin Xue, Javier Sanchez-Yamagishi, K. Watanabe, T. Taniguchi, Pablo Jarillo-Herrero, Brian J. Leroy

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

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.

Original languageEnglish (US)
Article number016801
JournalPhysical review letters
Volume108
Issue number1
DOIs
StatePublished - Jan 3 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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