Nuclear spin dynamics in the quantum regime of a single-molecule magnet
Mesoscale and Nanoscale Physics
2007-05-23 v2 Materials Science
Abstract
We show that the nuclear spin dynamics in the single-molecule magnet Mn12-ac below 1 K is governed by quantum tunneling fluctuations of the cluster spins, combined with intercluster nuclear spin diffusion. We also obtain the first experimental proof that - surprisingly - even deep in the quantum regime the nuclear spins remain in good thermal contact with the lattice phonons. We propose a simple model for how T-independent tunneling fluctuations can relax the nuclear polarization to the lattice, that may serve as a framework for more sophisticated theories.
Keywords
Cite
@article{arxiv.cond-mat/0403107,
title = {Nuclear spin dynamics in the quantum regime of a single-molecule magnet},
author = {Andrea Morello and Oleg N. Bakharev and Hans B. Brom and Roberta Sessoli and L. Jos de Jongh},
journal= {arXiv preprint arXiv:cond-mat/0403107},
year = {2007}
}
Comments
RevTex, 4 pages, 3 eps figures. Final version appeared in PRL