Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2006-01-19
Physics
Condensed Matter
Other Condensed Matter
21 pages, 13 figures
Scientific paper
10.1088/1367-2630/8/5/063
We study the electrical transport of a harmonically-bound, single-molecule endohedral fullerene shuttle operating in the Coulomb blockade regime, i.e. single electron shuttling. In particular we examine the dependance of the tunnel current on an ultra-small stationary force exerted on the shuttle. We derive a quantum master equation for the full shuttle system which includes the metallic contacts, the spatially dependent tunnel couplings to the shuttle, the electronic and motional degrees of freedom of the shuttle itself and a coupling of the shuttle's motion to a phonon bath. We analyse the resulting quantum master equation and find that, due to the exponential dependance of the tunnel probability on the shuttle-contact separation, the current is highly sensitive to very small forces. In particular we predict that the spin state of the endohedral electrons of the endohedral fullerene in a large magnetic gradient field can be distinguished from the resulting current signals within a few tens of nanoseconds. This effect could prove useful for the detection of the endohedral spin-state of individual paramagnetic molecules such as N@C60 and P@C60, or the detection of very small static forces acting on a molecular shuttle.
Goan* Hsi-Sheng
Milburn Gerald J.
Twamley Jason
Utami Dian Wahyu
No associations
LandOfFree
Spin-detection in a quantum electromechanical shuttle system does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin-detection in a quantum electromechanical shuttle system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-detection in a quantum electromechanical shuttle system will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-450002