期刊
NATURE PHYSICS
卷 8, 期 2, 页码 153-157出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS2157
关键词
-
资金
- Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the US Department of Energy [DE-AC02-05CH11231]
- US Department of Energy, Office of Basic Energy Sciences at Sandia National Laboratories [DE-AC04-94AL85000]
Controlling the flow of electrons by manipulating their spin is a key to the development of spin-based electronics. Recent demonstrations of electrical-gate control in spin-transistor configurations have shown great promise, but operation at room temperature remains elusive. Further progress requires a deeper understanding of the propagation of spin polarization, particularly in the high-mobility semiconductors used for devices. Here we report the application of Doppler velocimetry to resolve the motion of spin-polarized electrons in GaAs quantum wells driven by a drifting Fermi sea. We find that the spin mobility tracks the high electron mobility precisely as a function of temperature. However, we also observe that the coherent precession of spins driven by spin-orbit interaction, which is essential for the operation of a broad class of spin logic devices, breaks down at temperatures above 150 K, for reasons that are not yet understood theoretically.
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