2007/03/30 by J. Cserti, József Cserti, András Csordás +3 · 2 citations
Chemistry · Materials Science · Physics and Astronomy · #Bilayer #Bilayer graphene #Brillouin zone #Chemistry #Computer science #Condensed matter physics #Conductivity #Crystal structure #Crystallography #Graphene #Graphene research and applications #Image warping #Materials science #Membrane #Nanotechnology #Physics #Quantum and electron transport phenomena #Quantum mechanics #Thermal properties of materials #Trigonal crystal system #cond-mat.mes-hall #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.99.066802
published as Phys. Rev. Lett. 99, 066802 (2007) · 4 pages, 1 figure
arxiv created 2007/03/30 · openalex publication_date 2007/08/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using a reformulated Kubo formula we calculate the zero-energy minimal conductivity of bilayer graphene taking into account the small but finite trigonal warping. We find that the conductivity is independent of the strength of the trigonal warping and it is 3 times as large as that without trigonal warping and 6 times larger than that in single layer graphene. Although the trigonal warping of the dispersion relation around the valleys in the Brillouin zone is effective only for low-energy excitations, our result shows that its role cannot be neglected in the zero-energy minimal conductivity.