Electron and Nuclear Spin Dynamics in Antiferromagnetic Molecular Rings

Details Electron and Nuclear Spin Dynamics in Antiferromagnetic Molecular Rings Electron and Nuclear Spin Dynamics in Antiferromagnetic Molecular Rings

2001-01-06

arxiv.org/abs/cond-mat/0101073v2

Phys. Rev. Lett. 86, 5373 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 EPS figure, REVTeX; minor changes

Scientific paper

10.1103/PhysRevLett.86.5373

We study theoretically the spin dynamics of the ferric wheel, an antiferromagnetic molecular ring. For a single nuclear or impurity spin coupled to one of the electron spins of the ring, we calculate nuclear and electronic spin correlation functions and show that nuclear magnetic resonance (NMR) and electron spin resonance (ESR) techniques can be used to detect coherent tunneling of the Neel vector in these rings. The location of the NMR/ESR resonances gives the tunnel splitting and its linewidth an upper bound on the decoherence rate of the electron spin dynamics. We illustrate the experimental feasibility of our proposal with estimates for Fe_10 molecules.

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