The Model of Gartstein and Conwell

Gartstein and Conwell (1994a) derived a model that includes both diagonal and off-diagonal disorder. The elementary jump rate from site / to j was described as Vy = vQ WjjRiAjj). where vQ is a prefactor, Wy the bond strength that contains the electronic overlap factor, R a function of the energy difference between sites / and j, and A,y = tj - e7-. which includes the potential drop due to the field. The 

In ordered systems, the jump rate given by Eq. (24) leads to a field dependence of the mobility given as (Emia 1975) 

---