title: Spin quantum tunneling via entangled states in a dimer of exchange-coupled single-molecule magnets.
abstract: A new family of supramolecular, antiferromagnetically exchange-coupled dimers of single-molecule magnets (SMMs) has recently been reported. Each SMM acts as a bias on its neighbor, shifting the quantum tunneling resonances of the individual SMMs. Hysteresis loop measurements on a single crystal of SMM dimers have now established quantum tunneling of the magnetization via entangled states of the dimer. This shows that the dimer really does behave as a quantum mechanically coupled dimer, and also allows the measurement of the longitudinal and transverse superexchange coupling constants.
authors.affiliation: Laboratoire L. Néel, associé à l'UJF, CNRS, BP 166, 38042 Grenoble Cedex 9, France.
authors.forename: R
authors.initials: R
authors.lastname: Tiron
authors.forename: W
authors.initials: W
authors.lastname: Wernsdorfer
authors.forename: D
authors.initials: D
authors.lastname: Foguet-Albiol
authors.forename: N
authors.initials: N
authors.lastname: Aliaga-Alcalde
authors.forename: G
authors.initials: G
authors.lastname: Christou