Quantum Coherence in an Exchange-Coupled Dimer of Single-Molecule Magnets

摘要

A multi-high-frequency electron paramagnetic resonance method is used toprobe the magnetic excitations of a dimer of single-molecule magnets. Themeasured spectra display well resolved quantum transitions involving coherentsuperposition states of both molecules. The behavior may be understood in termsof an isotropic superexchange coupling between pairs of single-moleculemagnets, in analogy with several recently proposed quantum devices based onartificially fabricated quantum dots or clusters. These findings highlight thepotential utility of supramolecular chemistry in the design of future quantumdevices based on molecular nanomagnets.