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Author

Shin, Hyung-Joon
Nanoscale Materials Science Lab (NMSL)
Research Interests
  • Scanning tunneling microscopy, surface science, interface science, nanomaterials

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Fingerprints of Multiple Electron Scatterings in Single-Layer Graphene

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Title
Fingerprints of Multiple Electron Scatterings in Single-Layer Graphene
Author
Jung, MinbokSohn, So-DamPark, JonghyunLee, Keun-UShin, Hyung-Joon
Keywords
QUANTUM INTERFERENCE; EPITAXIAL GRAPHENE; SURFACE-STATES; CU(111); WAVES; STEPS; GAS
Issue Date
201603
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.6, no., pp.22570 -
Abstract
The electrons in graphene exhibit unusual behaviours, which can be described by massless Dirac quasiparticles. Understanding electron scattering in graphene has been of significant importance for its future application in electronic devices because electron scattering determines electrical properties such as resistivity and electron transport. There are two types of electron scatterings in graphene: intervalley scattering and intravalley scattering. In single-layer graphene, to date, it has been difficult to observe intravalley scattering because of the suppression of backscattering resulting from the chiral nature of the electrons in graphene. Here, we report the multiple electron scattering behaviours in single-layer graphene on a metallic substrate. By applying one- and two-dimensional Fourier transforms to maps of the local density of states, we can distinguish individual scattering processes from complex interference patterns. These techniques enable us to provide direct evidence of intravalley scattering, revealing a linear dispersion relation with a Fermi velocity of ∼7.4 × 105 m/s.
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DOI
http://dx.doi.org/10.1038/srep22570
ISSN
2045-2322
Appears in Collections:
MSE_Journal Papers
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