Plasmon resonances in current between parallel wires of finite length

The current–voltage (I–V) characteristics for perpendicular transport through two sequentially coupled wires of finite length is calculated analytically. Due to interwire interactions, the positions of steps in the I–V characteristics shift to lower voltages in comparison to noninteracting wires, which reflects the facilitation of current by interactions. The interwire interactions are also found to enhance the thermally activated current.