title: Confined dissipative droplet solitons in spin-valve nanowires with perpendicular magnetic anisotropy.
abstract: Magnetic dissipative droplets are localized, strongly nonlinear dynamical modes excited in nanocontact spin valves with perpendicular magnetic anisotropy. These modes find potential application in nanoscale structures for magnetic storage and computation, but dissipative droplet studies have so far been limited to extended thin films. Here, numerical and asymptotic analyses are used to demonstrate the existence and properties of novel solitons in confined structures. As a nanowire's width is decreased with a nanocontact of fixed size at its center, the observed modes undergo transitions from a fully localized two-dimensional droplet into a two-dimensional droplet edge mode and then a pulsating one-dimensional droplet. These solitons are interpreted as dissipative versions of classical, conservative solitons, allowing for an analytical description of the modes and the mechanisms of bifurcation. The presented results open up new possibilities for the study of low-dimensional solitons and droplet applications in nanostructures.
authors.affiliation: Physics Department, University of Gothenburg, 412 96, Gothenburg, Sweden.
authors.forename: Ezio
authors.initials: E
authors.lastname: Iacocca
authors.affiliation: Physics Department, University of Gothenburg, 412 96, Gothenburg, Sweden.
authors.forename: Randy K
authors.initials: RK
authors.lastname: Dumas
authors.affiliation: Department of Mathematics, North Carolina State University, Raleigh, North Carolina 27695, USA.
authors.forename: Lake
authors.initials: L
authors.lastname: Bookman
authors.affiliation: Material Physics, School of ICT, Royal Institute of Technology, Electrum 229, 164 40, Kista, Sweden and Department of Physics, Shahid Beheshti University, Evin, Tehran 19839, Iran.
authors.forename: Majid
authors.initials: M
authors.lastname: Mohseni
authors.affiliation: Physics Department, University of Gothenburg, 412 96, Gothenburg, Sweden and Material Physics, School of ICT, Royal Institute of Technology, Electrum 229, 164 40, Kista, Sweden.
authors.forename: Sunjae
authors.initials: S
authors.lastname: Chung
authors.affiliation: Department of Mathematics, North Carolina State University, Raleigh, North Carolina 27695, USA.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Hoefer
authors.affiliation: Physics Department, University of Gothenburg, 412 96, Gothenburg, Sweden and Material Physics, School of ICT, Royal Institute of Technology, Electrum 229, 164 40, Kista, Sweden.
authors.forename: Johan
authors.initials: J
authors.lastname: Akerman