在中电子测量和控制旋转传输
Ian Appelbaum1, Biqin Huang, Douwe J Monsma
1Department of Electrical and Computer Engineering, University of Delaware, Newark, Delaware 19716, USA. appelbaum@ee.udel.edu
Nature
|May 18, 2007
概括
我们在中展示了连贯的旋转传输,这是旋转电子学的一个有前途的半导体. 我们的新型热电子过方法克服了以前的局限性,使设备中的自旋漂移测量成为可能.
科学领域:
- 这就是Spintronics.
- 半导体物理 半导体物理
- 材料科学 材料科学 材料科学
背景情况:
- 电子自旋寿命和扩散长度是自旋电子器件的关键.
- 半导体提供比金属更长的自旋相干长度.
- 之前的旋转传输研究排除了像这样的非磁性,间接带隙半导体.
研究的目的:
- 为了证明 (Si) 中的连贯自旋传输.
- 克服先前实验方法的局限性,以在Si.中进行旋转传输.
- 探索在先进的自旋电子应用中的潜力.
主要方法:
- 开发了一种利用自旋依赖弹道热电子过的装置.
- 用铁磁薄膜进行旋转注入和检测.
- 测量了通过10微米的未使用的Si的旋转传输.
主要成果:
- 在中成功演示了导电带旋转传输.
- 热电子过方法避免了阻抗不匹配和寄生效应.
- 观察到自旋前行独立的磁性和电气控制.
结论:
- 证实了传导带中的连贯旋转漂移.
- 这项工作验证了作为自旋电子学的可行材料.
- 开发的方法为研究半导体中的自旋动力学开辟了新的途径.
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