2006/09/30 by Izak Snyman, I. Snyman, C. W. J. Beenakker · 4 citations
Chemistry · Materials Science · Physics and Astronomy · #Bilayer #Bilayer graphene #Carbon Nanotubes in Composites #Chemistry #Condensed matter physics #Coupling (piping) #Electron #Fano factor #Fermi energy #Fermi level #Graphene #Graphene research and applications #Materials science #Monolayer #Nanotechnology #Optics #Physics #Quantum and electron transport phenomena #Quantum mechanics #Shot noise #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.75.045322
published as Phys.Rev.B 75, 045322 (2007) · 6 pages, 7 figures, version to appear in PRB
arxiv created 2006/12/12 · openalex publication_date 2007/01/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We calculate the Fermi energy dependence of the (time-averaged) current and shot noise in an impurity-free carbon bilayer (length L⪡width W), and compare with known results for a monolayer. At the Dirac point of charge neutrality, the bilayer transmits as two independent monolayers in parallel: Both current and noise are resonant at twice the monolayer value, so that their ratio (the Fano factor) has the same 1∕3 value as in a monolayer---and the same value as in a diffusive metal. The range of Fermi energies around the Dirac point within which this pseudodiffusive result holds is smaller, however, in a bilayer than in a monolayer (by a factor l_\ensuremath⊥∕L, with l_\ensuremath⊥ the interlayer coupling length).