Single-electron Tunneling with Strong Mechanical Feedback

TL;DR

This paper investigates a regime where strong mechanical feedback in a nanomechanical-electronic system significantly alters current and noise, revealing a new dynamic behavior with potential implications for nanoscale devices.

Contribution

It introduces the concept of a strong feedback regime in nanomechanical-electronic systems and characterizes its effects on current and noise.

Findings

Current is strongly modified in the feedback regime.

Current noise exceeds the Schottky limit by orders of magnitude.

High quality factor is necessary for this regime.

Abstract

We show that there is a regime of strong feedback for a nanomechanical oscillatory mode weakly coupled to a single-electron tunneling device. In this regime, the current is strongly modified whereas the current noise is parametrically big exceeding the Schottky limit by orders of magnitude. This regime requires a high quality factor of nanomechanical oscillations.