The quasi-ballistic model of electron mobility in liquid hydrocarbons : Effect of an external electric field

The quasi-ballistic model of electron transport in liquid hydrocarbons, introduced earlier by the author [A. Mozumder, Chem. Phys. Lett. 207 (1993) 245], has been extended to the field dependence of mobility, when the zero-field mobility is low. A sinh-type dependence is obtained, due mainly to the random direction of detrapping relative to the field. The length parameter is interpreted as the trap radius1In this letter, the trap radius is taken to mean the extent of the trapped electron wave function. contradistinction to the jump length of the hopping model. Experimental data have been examined for six liquid hydrocarbons and a speculation is offered regarding the nature of the electron trap.