title: Dynamic control of magnetic nanowires by light-induced domain-wall kickoffs.
abstract: Controlling the speed at which systems evolve is a challenge shared by all disciplines, and otherwise unrelated areas use common theoretical frameworks towards this goal. A particularly widespread model is Glauber dynamics, which describes the time evolution of the Ising model and can be applied to any binary system. Here we show, using molecular nanowires under irradiation, that Glauber dynamics can be controlled by a novel domain-wall kickoff mechanism. In contrast to known processes, the kickoff has unambiguous fingerprints, slowing down the spin-flip attempt rate by several orders of magnitude, and following a scaling law. The required irradiance is very low, a substantial improvement over present methods of magneto-optical switching. These results provide a new way to control and study stochastic dynamic processes. Being general for Glauber dynamics, they can be extended to different kinds of magnetic nanowires and to numerous fields, ranging from social evolution to neural networks and chemical reactivity.
authors.affiliation: Physikalisches Institut, Universität Stuttgart, Stuttgart, Germany.
authors.forename: Eric
authors.initials: E
authors.lastname: Heintze
authors.forename: Fadi
authors.initials: F
authors.lastname: El Hallak
authors.forename: Conrad
authors.initials: C
authors.lastname: Clauß
authors.forename: Angelo
authors.initials: A
authors.lastname: Rettori
authors.forename: Maria Gloria
authors.initials: MG
authors.lastname: Pini
authors.forename: Federico
authors.initials: F
authors.lastname: Totti
authors.forename: Martin
authors.initials: M
authors.lastname: Dressel
authors.forename: Lapo
authors.initials: L
authors.lastname: Bogani