title: Propagation of spin information at the supramolecular scale through heteroaromatic linkers.
abstract: We report an in-depth study on how spin information propagates at supramolecular scale through a family of heteroaromatic linkers. By density-functional theory calculations, we rationalize the behavior of a series of Cr7Ni dimers for which we are able to systematically change the aromatic linker thus tuning the strength of the magnetic interaction, as experimentally shown by low temperature micro-SQUID and specific heat measurements. We also predict a cos2 dependence of the magnetic coupling on the twisting angle between the aromatic cycles in bicyclic linkers, a mechanism parallel to charge transport on similar systems [L. Venkataraman et al., Nature (London) 442, 904 (2006)].
authors.affiliation: S3-Institute Nanoscience-CNR, Via Campi 213/A, 41125 Modena, Italy. valerio.bellini@unimore.it
authors.forename: V
authors.initials: V
authors.lastname: Bellini
authors.forename: G
authors.initials: G
authors.lastname: Lorusso
authors.forename: A
authors.initials: A
authors.lastname: Candini
authors.forename: W
authors.initials: W
authors.lastname: Wernsdorfer
authors.forename: T B
authors.initials: TB
authors.lastname: Faust
authors.forename: G A
authors.initials: GA
authors.lastname: Timco
authors.forename: R E P
authors.initials: RE
authors.lastname: Winpenny
authors.forename: M
authors.initials: M
authors.lastname: Affronte