期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.216401
关键词
-
资金
- Next Generation Super Computing Project
- MEXT of Japan
- Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST program)
- NSC
- NCTS of Taiwan
- [19048015]
- [19048009]
- [1904008]
- [21244053]
- Grants-in-Aid for Scientific Research [19204035] Funding Source: KAKEN
We show, both experimentally and theoretically, a novel route to obtain giant room temperature spin-Hall effect due to surface-assisted skew scattering. In the experiment, we report the spin-Hall effect in Pt-doped Au films with different thicknesses t(N). The giant spin-Hall angle gamma(S) = 0.12 +/- 0.04 is obtained for tN = 10 nm at room temperature, while it is much smaller for the t(N) = 20 nm sample. Combined ab initio and quantum Monte Carlo calculations for the skew scattering due to a Pt impurity show gamma(S) congruent to 0.1 on the Au (111) surface, while it is small in bulk Au. The quantum Monte Carlo results show that the spin-orbit interaction of the Pt impurity on the Au (111) surface is enhanced, because the Pt 5d levels are lifted to the Fermi level due to the valence fluctuation. In addition, there are two spin-orbit interaction channels on the Au (111) surface, while only one in bulk Au.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据