Abstract
For high current transport in a medium, where the space charge effects of injected current are important, it is generally termed as space charge limited (SCL) current. In the one-dimensional planar gap, the SCL current density is given by the classical Child-Langmuir law1. The corresponding SCL current in a trap-free solid is known as Mott-Gurney law2, while the trap-limited current density for a trap-filled solid with exponentially distributed traps is described as the Mark-Helfrich law3.
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