EPR spectrum via entangled states for an Exchange-Coupled Dimer of Single-Molecule Magnets

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dc.creatorChang-Tan, Xu
dc.creatorJ-Q, Liang
dc.date2006-06-23
dc.date.accessioned2026-07-07T07:12:49Z
dc.date.available2026-07-07T07:12:49Z
dc.descriptionMulti-high-frequency electron paramagnetic resonance(EPR) spectrum for a supermolecular dimer $[ Mn_4]_2$ of single-molecule magnets recently reported [S. Hill, R. S. Edwards, N. Aliaga-Alcalde and G. Christou(HEAC), Science 302, 1015 (2003)] is studied in terms of the perturbation method in which the high-order corrections to the level splittings of degenerate states are included. It is shown that the corresponding eigenvectors are composed of entangled states of two molecules. The EPR-peak positions are calculated in terms of the eigenstates at various frequencies. From the best fit of theoretical level splittings with the measured values we obtain the anisotropy constant and exchange coupling which are in agreement with the corresponding values of experimental observation. Our study confirms the prediction of HEAC that the two $Mn_4$ units within the dimer are coupled quantum mechanically by the antiferromagnetic exchange interaction and the supermolecular dimer behaviors in analogy with artificially fabricated quantum dots.
dc.description16 pages,2 figures, 2 tables
dc.identifierhttps://arxiv.org/abs/cond-mat/0606602
dc.identifierhttp://arxiv.org/abs/cond-mat/0606602
dc.identifierdoi:10.1140/epjb/e2005-00146-y
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112212
dc.subjectMesoscale and Nanoscale Physics
dc.titleEPR spectrum via entangled states for an Exchange-Coupled Dimer of Single-Molecule Magnets
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