Bidirectional nuclear polarization through electric dipole spin resonance enabled by spin-orbit interaction in a single hole planar quantum dot device

IF 8.3 1区物理与天体物理 Q1 PHYSICS, APPLIED

npj Quantum Information Pub Date : 2025-08-07 DOI:10.1038/s41534-025-01075-0

Sergei Studenikin, Jordan Ducatel, Olivia Ellis, Marek Korkusinski, Alex Bogan, Piotr Zawadzki, D. Guy Austing, Andrew Sachrajda

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Abstract

Spin exchange between confined holes and nuclei has been demonstrated for zero-dimensional quantum dots by optical techniques but has not been observed for gated planar structures. Here, enabled by strong spin-orbit interaction, and under microwave (MW) illumination, we report hyperfine interaction and dynamic polarization of the nuclei with confined heavy-holes in a GaAs/AlGaAs double quantum dot device. Distinct signatures of the resultant hyperfine field on the electron dipole spin resonance (EDSR) signal include: hysteresis on sweeping the magnetic (B-) field up and down with characteristics that are strongly dependent on both MW power and B-field sweep rate; free bidirectional dragging of the EDSR condition; stable locking on resonance on a timescale of hours; slow temporal change as the hyperfine field decays (T₁ nuclear decay time ~ 100 s); and oscillations in time commensurate with Larmor precession of the ⁷⁵As nuclei. We attain pumped nuclear (Overhauser) fields ~ 25 mT (~20% nuclear polarization).

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单孔平面量子点器件中自旋轨道相互作用实现的电偶极自旋共振双向核极化

用光学技术证明了在零维量子点中约束空穴和原子核之间的自旋交换，但在门控平面结构中尚未观察到。在强自旋轨道相互作用的作用下，在微波（MW）照射下，我们报道了GaAs/AlGaAs双量子点器件中具有受限重空穴的原子核的超精细相互作用和动态极化。由此产生的超精细场对电子偶极子自旋共振（EDSR）信号的显著特征包括：上下扫磁（B-）场时的迟滞，其特征强烈依赖于毫微米功率和B场扫频速率；自由双向拖拽的EDSR条件；在小时的时间尺度上稳定锁定共振；随着超精细场的衰减，时间变化缓慢（T1核衰变时间~ 100 s）；在时间上的振荡与75As核的拉莫尔进动相当。我们获得了~ 25mt（~20%核极化）的泵浦核（Overhauser）场。

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来源期刊

npj Quantum Information Computer Science-Computer Science (miscellaneous)

CiteScore

13.70

自引率

3.90%

发文量

130

审稿时长

29 weeks

期刊介绍： The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.