Molecular spintronics: Coherent spin transfer in coupled quantum dots

Details Molecular spintronics: Coherent spin transfer in coupled quantum dots Molecular spintronics: Coherent spin transfer in coupled quantum dots

2004-01-21

arxiv.org/abs/cond-mat/0401397v2

Phys. Rev. B 69, 195315 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 6 figures; minor changes

Scientific paper

10.1103/PhysRevB.69.195315

Time-resolved Faraday rotation has recently demonstrated coherent transfer of electron spin between quantum dots coupled by conjugated molecules. Using a transfer Hamiltonian ansatz for the coupled quantum dots, we calculate the Faraday rotation signal as a function of the probe frequency in a pump-probe setup using neutral quantum dots. Additionally, we study the signal of one spin-polarized excess electron in the coupled dots. We show that, in both cases, the Faraday rotation angle is determined by the spin transfer probabilities and the Heisenberg spin exchange energy. By comparison of our results with experimental data, we find that the transfer matrix element for electrons in the conduction band is of order 0.08 eV and the spin transfer probabilities are of order 10%.

Affiliated with

Also associated with

No associations

Rating

Molecular spintronics: Coherent spin transfer in coupled quantum dots 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 Molecular spintronics: Coherent spin transfer in coupled quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular spintronics: Coherent spin transfer in coupled quantum dots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-641457