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Dawn of Cavity Spintronics

机译:腔自旋电子学的黎明

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Heroes are not always stars. This we know from the movies, but it is also true in the community of physicists. In the field of spintronics, my heros are Robert Silsbee and Mark Johnson. In 1979, Robert H. Silsbee, the 50-year old Cornell University professor on his sabbatical leave at the University of Paris-Sud, published an article in Physics Review B with the title "Coupling between ferromagnetic and conduction-spin-resonance modes at a ferromagnetic- normal-metal interface" . It revealed two new physical characteristics of a spin current. (1) through the microwave excitation of ferromagnetic resonance (FMR), a spin current can be generated in a ferromagnetic metal, which will flow into an adjacent normal metal. (2) Such a spin current pumped by FMR impacts the spin dynamics in the metal via the exchange interaction. Several decades later, from these two effects came Spin Pumping and Spin Torque , two seminal concepts of contemporary magnetism. Today, every conference on spintronics has celebrated talks on spin pumping. However, Silsbee et al.'s ground breaking paper has only been cited about 100 times in four decades. Many students of today studying spin pumping have never read that paper, and some have never even heard of it. The same thing has happened in the history of cinematography. In an era when movie goers celebrate blockbusters like "Star Wars", few of us remember the epic "2001, A Space Odyssey", a ground breaking work of art produced by Stanley Kubric in 1968, which enlightened George Lucas.
机译:英雄并不总是明星。我们从电影中知道这一点,但在物理学家中也是如此。在自旋电子学领域,我的英雄是Robert Silsbee和Mark Johnson。 1979年,现年50岁的康奈尔大学(Cornell University)教授休假于巴黎南大学(University of Paris-Sud)的罗伯特·希尔斯比(Robert H. Silsbee)在《物理评论B》上发表了一篇题为《铁磁与传导自旋共振模式之间的耦合铁磁-法向金属界面”。它揭示了自旋电流的两个新物理特性。 (1)通过铁磁谐振(FMR)的微波激发,可以在铁磁金属中产生自旋电流,该自旋电流将流入相邻的普通金属中。 (2)FMR抽运的这种自旋电流通过交换相互作用影响金属中的自旋动力学。几十年后,从这两种效应中产生了现代磁力的两个开创性概念-自旋泵浦和自旋扭矩。今天,每一次自旋电子学会议都庆祝了有关自旋泵浦的讨论。但是,在四十年中,Silsbee等人的突破性论文仅被引用了约100次。如今,许多学习自旋泵的学生都从未读过该论文,有些甚至从未听说过。摄影史上也发生了同样的事情。在电影爱好者庆祝“星球大战”等大片的时代,我们很少有人记得史诗般的“ 2001,太空漫游”,这是史丹利·库布里克(Stanley Kubric)1968年创作的开创性艺术作品,启发了乔治·卢卡斯(George Lucas)。

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