A single electron transistor with quantum rings

TL;DR

This paper introduces a novel single-electron transistor design utilizing charged quantum rings to control electron transport, demonstrating tunable conductance via quantum ring configurations.

Contribution

It presents a new transistor concept using quantum rings for electron transport control, with numerical analysis of conductance modulation in a 2D quantum wire.

Findings

Conductance can be tuned by adjusting quantum ring configurations.

Quadrupole ring configuration effectively controls electron switching.

Numerical simulations confirm the feasibility of the proposed device.

Abstract

We Have developed the concept of a new kind of single-electron transistor in which the transport of the electron through a quantum wire is controlled by charged quantum rings. Using a 2D harmonic potential as the transverse constraint, we numerically investigated the transport of the electron through the wire. We have shown that in the low energy limit, for a suitable configuration of the rings, called the quadrupole configuration, we are able to adjust the conductance of the wire and therefore control the switching process.