Jamming in the weighted gradient networks

► We introduce a weighted gradient network on the unweighted complex networks.► The edge weight is defined as the power-law function of the scalar difference between the two connected nodes.► The relations between the jamming factor J and the power exponent are studied.► For α>αc, J increases with increasing average connectivity, and for α<αc, the reverse occurs.► The jamming factor of the random and scale-free networks is compared.