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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.56: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster C

udkm1Dsim - A Python toolbox for simulating 1D ultrafast dynamics in condensed matter — •Daniel Schick — Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Berlin, Germany

The udkm1Dsim toolbox is a collection of Python classes and routines to simulate the thermal, structural, and magnetic dynamics after laser excitation, as well as the corresponding light-scattering response in stratified (1D) samples, such as multilayers. The toolbox provides the capabilities to define arbitrary layered structures on the atomic level including a rich database of element-specific physical properties. The excitation of dynamics is represented by an N-temperature model which is commonly applied in ultrafast physics. Structural dynamics due to thermal stresses are calculated by a linear-chain model of masses and springs. Magnetic dynamics can be calculated by a Landau-Lifschitz-Bloch or microscopic 3-temperature model. The resulting light-scattering response is computed by kinematical or dynamical X-ray theory which can also include polarization-dependent magnetic scattering. The udkm1Dsim toolbox is highly modular and allows for injecting user-defined inputs at any step within the simulation procedure.

Keywords: ultrafast dynamics; resonant magnetic scattering; Landua-Lifshitz-Bloch; coherent phonons; N-temperature model