Domain Wall Dynamics in Classical Spin Chains: Free Propagation, Subdiffusive Spreading, and Soliton Emission.

McRoberts, Adam J; Bilitewski, Thomas; Haque, Masudul; Moessner, Roderich

McRoberts, Adam J; Bilitewski, Thomas; Haque, Masudul; Moessner, Roderich.

Afiliación

McRoberts AJ; Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany.
Bilitewski T; Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
Haque M; Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany.
Moessner R; Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany.

Phys Rev Lett ; 132(5): 057202, 2024 Feb 02.

Article en En | MEDLINE | ID: mdl-38364166

ABSTRACT

ABSTRACT

The nonequilibrium dynamics of domain wall initial states in a classical anisotropic Heisenberg chain exhibits a striking coexistence of apparently linear and nonlinear behaviors the propagation and spreading of the domain wall can be captured quantitatively by linear, i.e., noninteracting, spin wave theory absent its usual justifications; while, simultaneously, for a wide range of easy-plane anisotropies, emission can take the place of stable solitons-a process and objects intrinsically associated with interactions and nonlinearities. The easy-axis domain wall only has transient dynamics, the isotropic one broadens diffusively, while the easy-plane one yields a pair of ballistically counterpropagating domain walls which, unusually, broaden subdiffusively, their width scaling as t^{1/3}.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Estados Unidos

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