2007/12/30 by Л. А. Пономаренко, L. A. Ponomarenko, F. Schedin +9 · 10 citations
Materials Science · Physics and Astronomy · #Advanced Chemical Physics Studies #Condensed matter physics #Coulomb blockade #Dynamical billiards #Electron #Graphene #Graphene quantum dot #Graphene research and applications #Materials science #Nanometre #Nanotechnology #Physics #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Transistor #cond-mat.mes-hall
paper · pdf · doi:10.1126/science.1154663
published as Science 320, 356-358 (2008)
arxiv created 2007/12/30 · openalex publication_date 2008/04/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The exceptional electronic properties of graphene, with its charge carriers mimicking relativistic quantum particles and its formidable potential in various applications, have ensured a rapid growth of interest in this new material. We report on electron transport in quantum dot devices carved entirely from graphene. At large sizes (>100 nanometers), they behave as conventional single-electron transistors, exhibiting periodic Coulomb blockade peaks. For quantum dots smaller than 100 nanometers, the peaks become strongly nonperiodic, indicating a major contribution of quantum confinement. Random peak spacing and its statistics are well described by the theory of chaotic neutrino billiards. Short constrictions of only a few nanometers in width remain conductive and reveal a confinement gap of up to 0.5 electron volt, demonstrating the possibility of molecular-scale electronics based on graphene.