Nonlinear Charging and Transport Times in Doped Nanotubes Junctions(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

概要

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The nonlinear capacitance in doped nanotube junctions is calculated self consistently. A negative differential capacitance is observed when the applied bias becomes larger than the pseudogap of the metallic armchair nanotube. For this device, one can deduce a relaxation time of approximately 0.1fs. Because of its negative differential resistance (NDR), a switching time of less than a femtosecond, i.e., at least three orders smaller than present-day switching times, can also be estimated. This effect is important in designing ultrafast nano-electronic components.
社団法人日本物理学会の論文
2005-02-15