2012/03/31 by Dong‐Keun Ki, Dong-Keun Ki, Alberto F. Morpurgo · 32 citations
Materials Science · Physics and Astronomy · #Band gap #Condensed matter physics #Conductance #Coulomb #Coulomb blockade #Electron #Graphene #Graphene nanoribbons #Graphene research and applications #Magnetic field #Materials science #Nanotechnology #Physics #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Surface and Thin Film Phenomena #Transistor #Voltage #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.108.266601
published in Physical Review Letters 108(26), 266601 (American Physical Society) · 5 pages and 5 figures, Accepted in Physical Review Letters
arxiv created 2012/05/25 · openalex publication_date 2012/06/26 · arxiv updated 2015/03/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Suspended graphene nanoribbons formed during current annealing of suspended graphene flakes have been investigated experimentally. Transport measurements show the opening of a transport gap around charge neutrality due to the formation of "Coulomb islands", coexisting with quantum Hall conductance plateaus appearing at moderate values of the magnetic field B. Upon increasing B, the transport gap is rapidly suppressed, and is taken over by a much larger energy gap due to electronic correlations. Our observations show that suspended nanoribbons allow the investigation of phenomena that could not so far be accessed in ribbons on SiO(2) substrates.