2009/11/15 by Qiong Ma, Tao Tu, Ma, Qiong +10
Engineering · Materials Science · Physics and Astronomy · #Carbon and Quantum Dots Applications #Graphene and Nanomaterials Applications #Graphene research and applications #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.0911.2845
7 pages, 6 figures
arxiv created 2009/11/15 · arxiv updated 2009/12/01
We study the conductance spectrum of graphene quantum dots, both single and multiple cases. The single electron tunneling phenomenon is investigated and the periodicity, amplitude and line shape of the Coulomb blockade oscillations at low temperatures are obtained. Further, we discuss the transport behavior when multiple dots are assembled in array and find a phase transition of conductance spectra from individual Coulomb blockade to collective Coulomb blockade.