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26 April 2024 |
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Low-energy Electron Reflectivity from Graphene | | R. M. Feenstra
; N. Srivastava
; M. Widom
; Bogdan Diaconescu
; Taisuke Ohta
; G. L. Kellogg
; J. T. Robinson
; I. V. Vlassiouk
; | | Date: |
28 Nov 2012 | | Abstract: | Low-energy reflectivity of electrons from single- and multi-layer graphene is
examined both theoretically and experimentally. A series of minima in the
reflectivity over the energy range of 0 - 8 eV are found, with the number of
minima depending on the number of graphene layers. Using first-principles
computations, it is demonstrated that a free standing n-layer graphene slab
produces n-1 reflectivity minima. This same result is also found experimentally
for graphene supported on SiO2. For graphene bonded onto other substrates it is
argued that a similar series of reflectivity minima is expected, although in
certain cases an additional minimum occurs, at an energy that depends on the
graphene-substrate separation and the effective potential in that space. | | Source: | arXiv, 1211.6676 | | Services: | Forum | Review | PDF | Favorites | |
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