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Solitons, Breathers, and rogue waves in ferromagnet
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报告题目:Solitons, Breathers, and rogue waves in ferromagnet
报告人:李再东, 教授, 河北工业大学
照片:

邀请人:张玉娟
报告时间:9月27日上午9:00-10:00
报告地点:信远楼II206数统院报告厅
报告人简介:
李再东,男,2005年山西大学理论物理研究所博士毕业,现为河北工业大学理学院教授,主持国家自然科学基金、河北省杰出青年基金和教育部科学技术研究重点项目等多个项目;科研上主要从事理论物理的研究,主要涉及自旋电子学、磁孤子、光孤子及怪波、玻色-爱因斯坦凝聚等方向,共发表SCI检索论文59篇,主要结果发表在物理评论(Phys. Rev. A、B、E)、美国物理年刊(Ann. Phys. (N. Y.))、应用物理(J. Appl. Phys.)、光通讯(Opt. Commun.)、和J Phys. C上,文章SCI总引用率他引600多次。

报告摘要:
In terms of Darboux transformation, we investigate the dynamic process of spinwave passing through amagneticsoliton. It causes nonlinear excitations, such as Akhmedievbreathers solution and Kuznetsov-Ma soliton. The former case demonstrates a spatial periodic process of a magnetic soliton forming the petal with four pieces. The spatial separation of adjacent magnetic petals increases rapidly, while one valley splits into two and the amplitudeof valley increases gradually with the increasing amplitude of spin wave. The other case shows a localized process of the spin-wave background. In the limit case, we get rogue waves and clarify its formation mechanism.
  We also theoretically investigate the effect of Dzyaloshinskii-Moriya interaction on magnetic soliton in anisotropic ferromagnetic nanowires driven by the adiabatic spin-transfer torque. The Dzyaloshinskii-Moriya interaction changes the formation region of soliton solution and the corresponding phase diagram is given for different soliton solution type.

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