Current facilitation by plasmon resonances between parallel wires of finite length

TL;DR

This paper analytically investigates how plasmon resonances facilitate current in coupled finite-length wires, revealing interaction-induced shifts and enhancements in IV characteristics within Coulomb blockade regimes.

Contribution

It provides an analytical model showing how interwire interactions and plasmon resonances influence electron transport in coupled finite-length wires.

Findings

Plasmon resonances create steps in IV characteristics.

Interwire interactions lower peak voltages.

Interactions enhance thermally activated current.

Abstract

The current voltage (IV) characteristics for perpendicular transport through two sequentially coupled wires of finite length is calculated analytically. The transport within a Coulomb blockade step is assisted by plasmon resonances that appear as steps in the IV characteristics with positions and heights depending on inter- and intrawire interactions. In particular, due to the interwire interactions, the peak positions shift to lower voltages in comparison to the noninteracting wires which reflects the facilitation of current by interactions. The interwire interactions are also found to enhance the thermally activated current.