Interaction of Strain and Nuclear Spins in Silicon: Quadrupolar Effects on Ionized Donors
Interaction of Strain and Nuclear Spins in Silicon: Quadrupolar Effects on Ionized Donors
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DOI：
10.1103/physrevlett.115.057601
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发表时间：
2015-07-29
影响因子：
8.6
通讯作者：
Brandt, Martin S.
中科院分区：
文献类型：
--
作者：
Franke, David P.;Hrubesch, Florian M.;Brandt, Martin S.
硅中电离施主的核自旋由于其很长的相干时间而成为一种有趣的量子资源。然而，它们的完美隔离是有代价的，因为没有施主电子使得核自旋难以控制。我们证明，四极相互作用使我们能够通过应变有效地调谐硅中电离砷施主的核磁共振，并确定S张量的两个非零元素，将该材料中的应变和电场梯度连接到S-11 = 1.5 x 10（22）V/m（2）和S-44 = 6 x 10（22）V/m（2）。我们发现一个更强的好处动态去耦的相干性的过渡受到一阶四极位移比那些只受到二阶位移和讨论的应用程序的四极物理，包括机械驱动的磁共振，冷却的机械谐振器，应变介导的自旋耦合。
The nuclear spins of ionized donors in silicon have become an interesting quantum resource due to their very long coherence times. Their perfect isolation, however, comes at a price, since the absence of the donor electron makes the nuclear spin difficult to control. We demonstrate that the quadrupolar interaction allows us to effectively tune the nuclear magnetic resonance of ionized arsenic donors in silicon via strain and determine the two nonzero elements of the S tensor linking strain and electric field gradients in this material to S-11 = 1.5 x 10(22) V/m(2) and S-44 = 6 x 10(22) V/m(2). We find a stronger benefit of dynamical decoupling on the coherence properties of transitions subject to first-order quadrupole shifts than on those subject to only second-order shifts and discuss applications of quadrupole physics including mechanical driving of magnetic resonance, cooling of mechanical resonators, and strain-mediated spin coupling.