Selfoscillations of Suspended Carbon Nanotubes with a Deflection Sensitive Resistance under Voltage Bias

TL;DR

This paper theoretically explores how suspended carbon nanotubes with deflection-sensitive resistance exhibit self-oscillations under high magnetic fields and voltage bias, revealing instability in charge transport leading to mechanical vibrations.

Contribution

It introduces a theoretical model demonstrating the conditions under which self-oscillations occur in suspended carbon nanotubes with deflection-sensitive resistance.

Findings

High magnetic fields induce instability in charge transport.

Self-oscillations involve mechanical vibrations and electrical oscillations.

The instability is absent only in a singular case.

Abstract

We theoretically investigate the electro-mechanics of a Suspended Carbon Nanotube with a Deflection Sensitive Resistance subjected to a homogeneous Magnetic Field and a constant Voltage Bias. We show that, (with the exception of a singular case), for a sufficiently high magnetic field the time-independent state of charge transport through the nanotube becomes unstable to selfexcitations of the mechanical vibration accompanied by oscialltions in the voltage drop and current across the nanotube.