Space charge limited current in a gap combined of free space and solid

Chandra, W.; Ang, L. K.
May 2010
Applied Physics Letters;5/3/2010, Vol. 96 Issue 18, p183501
Academic Journal
The paper presents a model of the space charge limited (SCL) electron conduction in a gap with a combination of free space and dielectric solid. The SCL electron current density J is solved numerically to obtain the voltage scaling of J∼VGn, and n is found to be between n=3/2 (a vacuum gap) and n=2 (a dielectric diode). The dependence of n is calculated as a function of dielectric constant, electron mobility, and the relative length scale between the free space and dielectric solid. The model has been used to explain a recent experiment.


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