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Long wavelength local density of states oscillations near graphene step edges

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arxiv 1111.2548 v1 pith:ZM2NQGT4 submitted 2011-11-10 cond-mat.mes-hall cond-mat.mtrl-sci

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 This is my paper
classification cond-mat.mes-hall cond-mat.mtrl-sci
keywords graphenestepldososcillationswavelengthdensityedgeedges
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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