第271期:Spin Hall Effect
报告题目: Spin Hall Effect
报告人: Prof. Guang-Yu Guo (郭光宇) (Department of Physics, National Taiwan University)
时间: 2015年12月25日 (星期五) 上午 10:00
地点: 中科院半导体研究所图书馆101室
Abstract: Spin Hall effect (SHE) refers to the generation of transverse spin current in nonmagnetic solids by an applied electric field due to relativistic spin-orbit coupling. Spin current generation, detection and manipulation are three key elements of the emerging spintronics. Large room temperature SHE not only provides dissipationless spin current but also is used to probe spin current and to drive magneto-electronic devices with little power consumption. Recent intensive research on SHE has also led us to such topical fields as topological insulators and spin caloritronics. In this talk, I will first give an overview on SHE. This will be followed by a presentation of my own theoretical investigations on SHE, including Berry phase theory and ab initio relativistic band structure method [1,2], large intrinsic SHE in metals [2,3] and gigantic SHE due to multi-orbital Kondo effect in gold with iron impurities [4,5]. References: [1] G. Y. Guo, Y. Yao and Q. Niu, Phys. Rev. Lett. 94, 226601 (2005). [2] G. Y. Guo, S. Murakami, T. W. Chen, and N. Nagaosa, Phys. Rev. Lett. 100, 096401 (2008). [3] G. Y. Guo, J. Appl. Phys. 105, 07C701 (2009). [4] G. Y. Guo, S. Maekawa, and N. Nagaosa, Phys. Rev. Lett. 102, 036401 (2009). [5] B. Gu, J.-Y. Gan, N. Bulut, T. Ziman, G. Y. Guo, N. Nagaosa and S. Maekawa, Phys. Rev. Lett. 105, 086401 (2010).
报告人简介:郭光宇,国立台湾大学物理系特聘教授。郭光宇教授于1987年在英国剑桥大学获得博士学位。1987年至1998年在英国Daresbury实验室理论和计算科学部先后从事博士后研究及担任专任科学家。1998年至今先后担任国立台湾大学物理系专任教授和特聘教授。2009年至2013年期间,担任国立政治大学理学院副院长及应用物理研究所讲座教授兼所长。郭光宇教授专长于理论和计算固态物理,研究集中在发展和应用量子电子结构理论计算和古典电磁模拟方法,探讨尖端材料(如高温超导、半导体、超薄磁性金属多层膜、过渡金属氧化物、纳米管与纳米线、石墨烯等)的新颖物理和化学性质。郭光宇教授于2005当选为美国物理学会会士(APS Fellow),2013年当选为英国物理学会会士(IOP Fellow),两次当选为国际纯粹与应用物理联合会(IUPAP)计算物理分会(C20)理事,2014年再度当选为该联合会磁学分会理事。目前,发表了200多篇SCI论文,其中多篇发表在在Science、Phys. Rev. Lett.、Nano Lett.、J. Amer. Chem. Soc.等顶尖期刊上。论文被引用4500多次,近三年,每年被引用次数超过350次,H指数为38。