TY - JOUR
T1 - Long-wavelength local density of states oscillations near graphene step edges
AU - Xue, Jiamin
AU - Sanchez-Yamagishi, Javier
AU - Watanabe, K.
AU - Taniguchi, T.
AU - Jarillo-Herrero, Pablo
AU - Leroy, Brian J.
PY - 2012/1/3
Y1 - 2012/1/3
N2 - 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.
AB - 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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U2 - 10.1103/PhysRevLett.108.016801
DO - 10.1103/PhysRevLett.108.016801
M3 - Article
C2 - 22304277
AN - SCOPUS:84855486667
SN - 0031-9007
VL - 108
JO - Physical review letters
JF - Physical review letters
IS - 1
M1 - 016801
ER -