Many-spin effects and tunneling splittings in Mn12 magnetic molecules

H. A. De Raedt; A. H. Hams; V. V. Dobrovitski; M. Al-Saqer; M. I. Katsnelson; B. N. Harmon

doi:10.1016/S0304-8853(02)00111-7

Many-spin effects and tunneling splittings in Mn12 magnetic molecules

Mesoscale and Nanoscale Physics 2009-10-31 v2 Materials Science

Authors: H. A. De Raedt , A. H. Hams , V. V. Dobrovitski , M. Al-Saqer , M. I. Katsnelson , B. N. Harmon

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Abstract

We calculate the tunneling splittings in a Mn $_{12}$ magnetic molecule taking into account its internal many-spin structure. We discuss the precision and reliability of these calculations and show that restricting the basis (limiting the number of excitations taken into account) may lead to significant error (orders of magnitude) in the resulting tunneling splittings for the lowest energy levels, so that an intuitive picture of different decoupled energy scales does not hold in this case. Possible routes for further development of the many-spin model of Mn $_{12}$ are discussed.

Keywords

Mn12 magnetic molecule tunneling splittings many-spin effects spin structure energy scales basis restriction

Cite

@article{arxiv.cond-mat/0006504,
  title  = {Many-spin effects and tunneling splittings in Mn12 magnetic molecules},
  author = {H. A. De Raedt and A. H. Hams and V. V. Dobrovitski and M. Al-Saqer and M. I. Katsnelson and B. N. Harmon},
  journal= {arXiv preprint arXiv:cond-mat/0006504},
  year   = {2009}
}

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REVTeX4, 5 pages, 1 figure (PostScript). Version 2, substantially revised

Many-spin effects and tunneling splittings in Mn12 magnetic molecules

Abstract

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