Electrically driven single-electron spin resonance in a slanting Zeeman field
Electrically driven single-electron spin resonance in a slanting Zeeman field
复制标题
DOI：
10.1038/nphys1053
复制
发表时间：
2008-10-01
期刊：
影响因子：
19.6
通讯作者：
Tarucha, S.
中科院分区：
文献类型：
--
作者：
Pioro-Ladriere, M.;Obata, T.;Tarucha, S.
自旋电子学和量子信息科学的迅速崛起引发了人们对开发相干操纵电子自旋能力的浓厚兴趣(1)。电子自旋共振(2) 是一种操纵自旋的强大技术，通常通过施加振荡磁场来实现。然而，事实证明这种技术在处理单个自旋时非常具有挑战性(3-5)。相比之下，通过工程非均匀磁场以可控的方式混合自旋和电荷自由度，电子自旋就可以在不需要高频磁场的情况下进行电操控（6,7）。在这里，我们报告了通过将微米级铁磁体集成到双量子点器件中，实现电驱动两个电子的可寻址自旋旋转的实验。我们发现，正是微磁体的杂散磁场实现了电控制和自旋选择性。研究结果表明，我们的方法可以适用于多量子点结构，因此可以为以可扩展的方式电控电子自旋开辟一条途径。
The rapid rise of spintronics and quantum information science has led to a strong interest in developing the ability to coherently manipulate electron spins(1). Electron spin resonance(2) is a powerful technique for manipulating spins that is commonly achieved by applying an oscillating magnetic field. However, the technique has proven very challenging when addressing individual spins(3-5). In contrast, by mixing the spin and charge degrees of freedom in a controlled way through engineered non-uniform magnetic fields, electron spin can be manipulated electrically without the need of high-frequency magnetic fields(6,7). Here we report experiments in which electrically driven addressable spin rotations on two individual electrons were realized by integrating a micrometre-size ferromagnet into a double-quantum-dot device. We find that it is the stray magnetic field of the micromagnet that enables the electrical control and spin selectivity. The results suggest that our approach can be tailored to multidot architecture and therefore could open an avenue towards manipulating electron spins electrically in a scalable way.