Coulomb blockade in graphene quantum dots

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Authors
Ma, Qiong
Tu, Tao
Lin, Zhi-Rong
Guo, Guang-Can
Guo, Guo-Ping
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Abstract
Description
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.
Comment: 7 pages, 6 figures
Keywords
Condensed Matter - Mesoscale and Nanoscale Physics
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