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Spin dynamics and coherent tunnelling in the molecular magnetic rings Fe₆ and Fe₈

Honecker, A. and Meier, F. and Loss, D. and Normand, B.. (2002) Spin dynamics and coherent tunnelling in the molecular magnetic rings Fe₆ and Fe₈. The European physical journal. B, Condensed matter, Vol. 27, H. 4. pp. 487-495.

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Official URL: http://edoc.unibas.ch/dok/A5254713

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Abstract

We present detailed calculations of low-energy spin dynamics in the "ferric wheel" systems Na:Fe-6 and Cs:Fe-8 in a magnetic field. We compute by exact diagonalisation the low-energy spectra and matrix elements for total-spin and Neel-vector components, and thus the time-dependent correlation functions of these operators. Comparison of our results with the semiclassical theory of coherent quantum tunnelling of the Neel vector demonstrates the validity of a two-state description for the low-energy dynamics of ferric wheels. We discuss the implications of our results for mesoscopic quantum coherent phenomena, and for the experimental techniques to observe them, in molecular magnetic rings.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:EDP Sciences
ISSN:1434-6028
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:55

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