The quantum dynamics of atomic magnets, co-tunneling and dipolar-biased tunneling
Mesoscale and Nanoscale Physics
2009-11-10 v1
Abstract
Multi-spins tunneling cross-relaxations in an ensemble of weakly-coupled Ho ions, mediated by weak anisotropic dipolar interactions, can be evidenced by ac-susceptibility measurements in a high temperature regime. Based on a four-body representation, including the rare-earth nuclear spin, two-ions tunneling mechanisms can be attributed to both dipolar-biased tunneling and co-tunneling processes. The co-reversal involving entangled pairs of magnetic moments is discussed with a particular emphasis, giving new evidences to elucidate the many-body quantum dynamics.
Keywords
Cite
@article{arxiv.cond-mat/0307405,
title = {The quantum dynamics of atomic magnets, co-tunneling and dipolar-biased tunneling},
author = {R. Giraud and A. M. Tkachuk and B. Barbara},
journal= {arXiv preprint arXiv:cond-mat/0307405},
year = {2009}
}
Comments
4 figures