2007/11/30 by S. Fratini, F. Guinea · 7 citations
Engineering · Materials Science · Physics and Astronomy · #Advancements in Battery Materials #Amorphous solid #Bilayer graphene #Condensed matter physics #Electrical resistivity and conductivity #Electron #Graphene #Graphene research and applications #Materials science #Nanotechnology #Physics #Quantum and electron transport phenomena #Quasiparticle #Substrate (aquarium) #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.77.195415
published as Phys. Rev. B vol. 77, 195415 (2008) · 4 pages, 3 figs. Corrected for spinor overlap factors
arxiv created 2007/12/03 · openalex publication_date 2008/05/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the effects of polarizable substrates such as SiO2 and SiC on the carrier dynamics in graphene. We find that the quasiparticle spectrum acquires a finite broadening due to the long-range interaction with the polar modes at the interface between graphene and the substrate. This mechanism results in a density dependent electrical resistivity, which exhibits a sharp increase around room temperature, where it can become the dominant limiting factor of electron transport. The effects are weaker in doped bilayer graphene due to the more conventional parabolic band dispersion. Amorphous substrates, such as polymethyl methacrylate, can induce a room temperature resistivity of comparable magnitude, although with a weaker temperature dependence.