NEGATIVE DIFFERENTIAL RESISTANCE ON ELECTRON-TRANSPORT THROUGH ULTRASMALL PARTICLES

We present a theoretical study on a nem one-dimensional array of norma l tunnel junctions which produces a negative differential resistance. The junctions are composed of ultrasmall particles, and one of them go es in the direction opposite that of the external electric field. We s how de current-voltage characteristics for this system in terms of a b asic single-electron tunneling model. In this system, negative resista nce arises due to single-electron tunneling behavior.