Zhan-Ying Yang

The manipulation of magnons in artificial magnonic crystals (MCs) leads to fascinating nonlinear wave phenomena such as the generation of gap solitons, which has been mostly limited to one-dimensional systems. Here, we propose a model system for the magnetization in two-dimensional MCs subjected to a periodic external magnetic field, describing the dynamics of magnetic gap solitons (MGSs) formed by nonlinear self-trapping.

We propose a novel model which efficiently describes the magnetization dynamics in a magnetic bilayer system. By applying a particular gauge transformation to the Landau-Lifshitz-Gilbert (LLG) equation, we successfully convert the model into an exactly integrable framework. Thus the obtained analytical solutions allow us to predict a one-dimensional magnetic soliton pair existing by tuning the thickness of the spacing layer between the two ferrimagnetic layers.

Abstract We numerically study the dynamics of a one-dimensional matter-wave soliton colliding with a vibrating atomic mirror. After colliding, the soliton splits into several wave packets with discrete momentum, and the kinetic energy of internal atoms is quantized. The reflected wave packets are originally diffusing but can form soliton states by quenching the nonlinear strength.