Symmetrized general hopping current equation.
We show that within the validity range of local thermal equilibrium--therein, however, irrespective of the magnitude of the driving force--a simple current equation can be formulated that expresses the current in terms of a product of a local nonequilibrium conductivity and a sinh function of half the electrochemical potential drop (normalized with respect to kBT) over the local hopping distance. This local current/driving force relation takes account of both electrical and compositional effects and can be generalized as to include interactions and structural variations.
Max-Planck-Institut für Festkörperforschung, Heisenbergstrabe 1, 70569 Stuttgart, Germany. riess@techunix.technion.ac.il
Ilan
I
Riess
Joachim
J
Maier
D004563:Electrochemistry; D004574:Electromagnetic Fields; D007700:Kinetics; D046911:Macromolecular Substances; D008962:Models, Theoretical
D046911:Macromolecular Substances