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Utilizing a BLG/superconductor junction (BLG/S) as a model structure, we show that the unique low energy quasiparticle nature of BLG results in two striking features: (1) AR is completely absent, making BLG/S 100% electron reflective; (2) electrons are valley-selectively focused upon retro-reflection.
The boomerang-shaped constant energy band contour occurs in a Bernal-stacked bilayer graphene (BLG).
It was shown that AR in BLG is a small effect in the order of Ek/γ1.
The absence of AR is related to the Klein tunneling effect and Berry phase in BLG.
Here we show that electrons can undergo retro-reflection in bilayer graphene (BLG).
In BLG, the negative electron refractive index originates from its anisotropic constant energy band contour16.
In BLG, the low energy electrons reside in two inequivalent K and K′ valleys.
BLG was not susceptible to TrTyr without heat treatment.
In a BLG/S hybrid junction, the 2π Berry phase of low energy electrons in BLG manifests itself in a striking manner: AR is completely absent regardless the angle of incidence.
Yu, S. L. et al. Highly efficient modification of beta-lactoglobulin (BLG) gene via zinc-finger nucleases in cattle.
A Veselago electron-lens based on single layer graphene (SLG) and BLG p-n junctions has previously been reported15,16.
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