...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Interface reflectivity of a superdiffusive spin current in ultrafast demagnetization and terahertz emission
【24h】

Interface reflectivity of a superdiffusive spin current in ultrafast demagnetization and terahertz emission

机译：超快退磁和太赫兹发射中超扩散自旋电流的界面反射率

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The spin- and energy-dependent interface reflectivity of a ferromagnetic (FM) film in contact with a nonmagnetic (NM) film is calculated using a first-principles transport method and incorporated into the superdiffusive spin transport model to study the femtosecond laser-induced ultrafast demagnetization of Fe|NM and Ni|NM (NM = Au, A1, and Pt) bilayers. By comparing the calculated demagnetization with transparent and real interfaces, we demonstrate that the spin-dependent reflection of hot electrons has a noticeable influence on the ultrafast demagnetization and the associated terahertz (THz) electromagnetic radiation. In particular, a spin filtering effect is found at the Fe|NM interface that increases the spin current injected into the NM metal, which enhances both the resulting demagnetization and the resulting THz emission. This suggests that the THz radiation can be optimized by tailoring the interface, indicating a very large tunability.
机译：使用第一原理传输方法计算与非磁性（NM）膜接触的铁磁（FM）膜与自旋和能量相关的界面反射率，并将其结合到超扩散自旋输运模型中以研究飞秒激光诱导的超快Fe | NM和Ni | NM（NM = Au，Al和Pt）双层的退磁。通过将计算出的退磁与透明和真实界面进行比较，我们证明了热电子的自旋相关反射对超快退磁和相关的太赫兹（THz）电磁辐射具有显着影响。特别是，在Fe | NM界面处发现了自旋滤波效应，该效应增加了注入到NM金属中的自旋电流，从而增强了最终的消磁和最终的THz发射。这表明可以通过调整界面来优化THz辐射，这表明可调性非常大。

著录项

  • 来源
    《Physical review》 |2020年第1期|014435.1-014435.13|共13页
  • 作者

    Wen-Tian Lu; Yawen Zhao; Marco Battiato; Yizheng Wu; Zhe Yuan;

  • 作者单位

    Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Beijing 100875 China;

    School of Physical and Mathematical Sciences Physics and Applied Physics Nanyang Technological University 21 Nanyang Link Singapore Singapore;

    Department of Physics State Key Laboratory of Surface Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号