報告時(shí)間：4月13日下午14：00

報告地點(diǎn)：理學(xué)樓417

報告人：李再東

報告題目：Solitons, Breathers, and roguewaves in ferromagnet

報告人簡(jiǎn)介：

李再東，男，2005年山西大學(xué)理論物理研究所博士畢業(yè)，現為河北工業(yè)大學(xué)理學(xué)院教授，理論物理學(xué)術(shù)帶頭人。主持完成國家自然科學(xué)基金、河北省杰出青年基金和教育部科學(xué)技術(shù)研究重點(diǎn)項目等多個(gè)項目，主要從事自旋電子學(xué)、光脈沖傳播理論以及玻色-愛(ài)因斯坦凝聚等研究。

報告內容簡(jiǎn)介：

In terms of Darboux transformation, we investigate thedynamic process of spin wave passing through amagnetic soliton. It causesnonlinear excitations, such as Akhmediev breathers solution and Kuznetsov-Masoliton. The former case demonstrates a spatial periodic process of a magneticsoliton forming the petal with four pieces. The spatial separation of adjacentmagnetic petals increases rapidly, while one valley splits into two and theamplitude of valley increases gradually with the increasing amplitude of spinwave. The other case shows a localized process of the spin-wave background. Inthe limit case, we get rogue waves and clarify its formation mechanism.

Wealso theoretically investigate the effect of Dzyaloshinskii-Moriya interactionon magnetic soliton in anisotropic ferromagnetic nanowires driven by theadiabatic spin-transfer torque. The Dzyaloshinskii-Moriya interaction changesthe formation region of soliton solution and the corresponding phase diagram isgiven for different soliton solution type.

理學(xué)院

2017年4月11日