Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2005-02-03
Physics
Condensed Matter
Other Condensed Matter
12 pages, 9 figures. Submitted Phys. Rev. B
Scientific paper
10.1103/PhysRevB.72.085320
Time-resolved Faradary rotation experiments have demonstrated coherent transfer of electron spin between CdSe colloidal quantum dots coupled by conjugated molecules. We employ here a Green's function approach, using semi-empirical tight-binding to treat the nanocrystal Hamiltonian and Extended Huckel theory to treat the linking molecule Hamiltonian, to obtain the coherent transfer probabilities from atomistic calculations, without the introduction of any new parameters. Calculations on 1,4-dithiolbenzene and 1,4-dithiolcyclohexane linked nanocrystals agree qualitatively with experiment and provide support for a previous transfer Hamiltonian model. We find a striking dependence on the transfer probabilities as a function of nanocrystal surface site attachment and linking molecule conformation. Additionally, we predict quantum interference effects in the coherent transfer probabilities for 2,7-dithiolnaphthalene and 2,6-dithiolnaphthalene linking molecules. We suggest possible experiments based on these results that would test the coherent, through-molecule transfer mechanism.
Schrier Joshua
Whaley Birgitta K.
No associations
LandOfFree
Atomistic Theory of Coherent Spin Transfer between Molecularly Bridged 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 Atomistic Theory of Coherent Spin Transfer between Molecularly Bridged Quantum Dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atomistic Theory of Coherent Spin Transfer between Molecularly Bridged Quantum Dots will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-176912