Photoinduced topological spin texture in a metallic ferromagnet

Abstract

Photoinduced nonequilibrium spin structure is examined in the double-exchange model, in which itinerant electrons couple with localized spins through the ferromagnetic Hund coupling. In particular, we focus on the transient spin structure from the initial ferromagnetic metallic state to the steady antiferromagnetic ordered state reported in [Phys. Rev. Lett. 119, 207202 (2017)]. By solving the Schrödinger equation combined with the Landau-Lifshitz-Gilbert equation, we find finite winding number and chirality, which implies emergence of topological chiral spin textures. These observations are reproduced by a calculation where spin dynamics after sudden quench of the chemical potential are examined in larger clusters. A possible mechanism of the topological spin texture in the transient dynamics is discussed.

5 pages, 4 figures

References in corpus (6)

• Spin current and magneto-electric effect in non-collinear magnets
• The Kernel Polynomial Method
• Theoretically predicted picosecond optical switching of spin chirality in multiferroics
• Gradient-based stochastic estimation of the density matrix
• Photoinduced charge and spin dynamics in strongly correlated electron systems
• Photocontrol of magnetic structure in an itinerant magnet

Cited by in corpus (7)

• Locking of skyrmion cores on a centrosymmetric discrete lattice: onsite versus offsite
• Temperature-driven transition from skyrmion to bubble crystals in centrosymmetric itinerant magnets
• Driving spin chirality by electron dynamics in laser-excited antiferromagnets
• Ultrafast optical generation of antiferromagnetic meron-antimeron pairs with conservation of topological charge
• Photocontrol of spin scalar chirality in centrosymmetric itinerant magnets
• Photoinduced 120-degree spin order in the Kondo-lattice model on a triangular lattice
• Electric-Field-Induced Antiferromagnetic Insulating State in a Metallic Ferromagnet