Magnetic Molecule on a Microcantilever: Quantum Magneto-mechanical Oscillations

TL;DR

This paper investigates the quantum dynamics of a magnetic molecule on a microcantilever, demonstrating that current experimental methods can observe coupled magneto-mechanical oscillations and spin tunneling effects.

Contribution

It provides a parameter-free theoretical analysis of coupled spin and mechanical oscillations, predicting observable quantum effects in a magneto-mechanical system.

Findings

Coupled oscillations of spin and cantilever are observable with existing techniques.

Spin tunneling causes measurable splitting of mechanical modes.

Theoretical predictions align with experimental feasibility.

Abstract

We study the quantum dynamics of a system consisting of a magnetic molecule placed on a microcantilever. The amplitude and frequencies of the coupled magneto-mechanical oscillations are computed. Parameter-free theory shows that the existing experimental techniques permit observation of the driven coupled oscillations of the spin and the cantilever, as well as of the splitting of the mechanical modes of the cantilever caused by spin tunneling.