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arXiv 1602.09068cond-mat.mes-hall
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基于自旋分裂超导体的时钟单自旋源

Clocked single-spin source based on a spin-split superconductor

Niklas Dittmann, Janine Splettstoesser, Francesco Giazotto

摘要:

我们提出了一个精确的时钟单自旋源的交流自旋电子学应用。我们的设备包括一个超导岛覆盖的铁磁绝缘层,通过它耦合到超导引线。单粒子转移依赖于能隙和岛的充电能量,并通过偏压和时间周期性栅极电压来实现。精确的自旋转移是通过铁磁绝缘层实现的,该铁磁绝缘层使岛极化,提供自旋选择性隧穿势垒,并通过抑制Andreev反射来提高精度。我们分析现实的材料组合和实验要求,允许在MHz制度的时钟自旋电流。

英文摘要:

We propose an accurate clocked single-spin source for ac-spintronic applications. Our device consists of a superconducting island covered by a ferromagnetic insulator layer through which it is coupled to superconducting leads. Single-particle transfer relies on the energy gaps and the island's charging energy, and is enabled by a bias and a time-periodic gate voltage. Accurate spin transfer is achieved by the ferromagnetic insulator layer which polarizes the island, provides spin-selective tunneling barriers and improves the precision by suppressing Andreev reflection. We analyze realistic material combinations and experimental requirements which allow for a clocked spin current in the MHz regime.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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