Nuclear spin dynamics in the quantum regime of a single-molecule magnet

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 reg...

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Published in:arXiv.org 2004-11
Main Authors: Morello, Andrea, Bakharev, Oleg N, Brom, Hans B, Sessoli, Roberta, L Jos de Jongh
Format: Article
Language:English
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Nuclear spin
Quantum tunnelling
Spin dynamics
Variations
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Bakharev, Oleg N
Brom, Hans B
Sessoli, Roberta
L Jos de Jongh
description 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.
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subjects Nuclear spin
Quantum tunnelling
Spin dynamics
Variations
title Nuclear spin dynamics in the quantum regime of a single-molecule magnet
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