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Volumn 79, Issue 11, 2009, Pages

Andreev reflection in graphene nanoribbons

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EID: 65349084923     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.115131     Document Type: Article
Times cited : (74)

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    • If one chooses kx > [-π/ (a3), π/ (a3)] then sp (x) = (-1) n1 - n2 for even NW, whereas sA = (-1) n1 - n2 and sB = (-1) n1 - n2 +1 for odd NW.
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    • At higher energies and for the other bands the evanescent waves 3 become less localized at the edges (Ref.) and eventually turn into an oscillatory behavior when ky becomes imaginary. Nevertheless, the characterization of the bands via the pseudoparity quantum number holds at all energies, as depicted in Fig. 3.
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    • Notice that since graphene honeycomb lattice is bipartite, a simplified model in which Δi is assumed as a steplike function along the x direction would effectively imply a rapid variation in Δi also transversally along the two-site cells. Since such situation would not be realistic, we have adopted a smooth variation in Δi over a length λ 10a along the x direction.
    • Notice that since graphene honeycomb lattice is bipartite, a simplified model in which Δi is assumed as a steplike function along the x direction would effectively imply a rapid variation in Δi also transversally along the two-site cells. Since such situation would not be realistic, we have adopted a smooth variation in Δi over a length λ 10a along the x direction.
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    • The fact that G vanishes in the range Δ0
    • The fact that G vanishes in the range Δ0


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