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Child–Langmuir law in the Coulomb blockade regime

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2 Author(s)
Zhu, Yingbin ; School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore ; Ang, L. K.

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The one-dimensional (1D) classical Child–Langmuir (CL) law has been extended to the Coulomb blockade (single to few electrons) regime, including the effect of single-electron charging. It is found that there is a threshold of voltage (Vth) equals to one-half of the single-electron charging energy for electron injection assuming zero barrier at the interface. For voltage in the range of 1<V/Vth<2, there is only one electron inside the gap, and the time-averaged single-electron injected current is equal or higher than the 1D CL current.

Published in:

Applied Physics Letters  (Volume:98 ,  Issue: 5 )