2021/09/30 by Giulia Piccinini, Vaidotas Mišeikis, Kenji Watanabe +3
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Bilayer #Bilayer graphene #Chemical physics #Chemistry #Composite material #Condensed matter physics #Conductivity #Dielectric #Graphene #Graphene research and applications #Materials science #Membrane #Nanopore and Nanochannel Transport Studies #Nanotechnology #Optoelectronics #Physical chemistry #Physics #Quantum and electron transport phenomena #Thermal conduction #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.104.l241410
This is the unedited authors' version of the submitted article, published in Phys. Rev. B 104, L241410 (2021), 23 pages, main text and supplementary information
openalex publication_date 2021/12/27 · arxiv created 2022/01/11 · arxiv updated 2022/01/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We employ dual-gated 30 \ifmmode^∘\else\textdegree\fi-twisted bilayer graphene to demonstrate simultaneous ultrahigh mobility and conductivity (up to 40 mS at room temperature), unattainable in a single layer of graphene. We find quantitative agreement with a simple phenomenology of parallel conduction between two pristine graphene sheets, with a gate-controlled carrier distribution. Based on the parallel transport mechanism, we then introduce a method for in situ measurements of the chemical potential of the two layers. This twist-enabled approach, neither requiring a dielectric spacer, nor separate contacting, has the potential to greatly simplify the measurement of thermodynamic quantities in graphene-based systems of high current interest.