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arXiv 2106.13643cond-mat.mtrl-sci
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电子束操纵硅中单掺杂原子的机理

Mechanism of electron-beam manipulation of single dopant atoms in silicon

Alexander Markevich, Bethany M Hudak, Jacob Madsen, Jiaming Song, Paul C Snijders, Andrew R Lupini, Toma Susi

摘要:

掺杂剂原子在大块晶格中的精确定位可以在包括固态传感和量子计算在内的领域中实现新的应用。已建立的扫描探针技术是用于操纵表面原子的有能力的工具,但由于它们需要使物理尖端与样品接触而处于劣势。这引起了人们对电子束技术的兴趣,随后是第一个在晶体硅中操纵铋掺杂剂的原理验证实验。在这里,我们使用第一性原理建模,发现一种新的间接交换机制,允许电子的影响,非破坏性地移动掺杂剂与原子精度内的硅晶格。然而,这种机制只适用于两个最重的V族捐助者与分裂空位配置,Bi和Sb。我们验证我们的模型,通过直接成像这些配置为Bi,并通过证明,有前途的核自旋量子位Sb可以使用聚焦电子束操纵。

英文摘要:

The precise positioning of dopant atoms within bulk crystal lattices could enable novel applications in areas including solid-state sensing and quantum computation. Established scanning probe techniques are capable tools for the manipulation of surface atoms, but at a disadvantage due to their need to bring a physical tip into contact with the sample. This has prompted interest in electron-beam techniques, followed by the first proof-of-principle experiment of bismuth dopant manipulation in crystalline silicon. Here, we use first principles modeling to discover a novel indirect exchange mechanism that allows electron impacts to non-destructively move dopants with atomic precision within the silicon lattice. However, this mechanism only works for the two heaviest group V donors with split-vacancy configurations, Bi and Sb. We verify our model by directly imaging these configurations for Bi, and by demonstrating that the promising nuclear spin qubit Sb can be manipulated using a focused electron beam.

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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