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磷烯双量子点中自旋的电学操控

Electrical manipulation of the spins in phosphorene double quantum dots.

作者信息

Thakur Tanmay, Peeters Francois M, Szafran Bartłomiej

机构信息

Faculty of Physics and Applied Computer Science, AGH University of Krakow, al. Mickiewicza 30, 30-059, Kraków, Poland.

Department of Physics, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.

出版信息

Sci Rep. 2024 Aug 16;14(1):18966. doi: 10.1038/s41598-024-67955-1.

DOI:10.1038/s41598-024-67955-1
PMID:39152176
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11329667/
Abstract

We investigate electric dipole spin resonance (EDSR) induced by an oscillating electric field within a system of double quantum dots formed electrostatically in monolayer phosphorene. Apart from the observed anisotropy of effective masses, phosphorene has been predicted to exhibit anisotropic spin-orbit coupling. Here, we examine a system consisting of two electrons confined in double quantum dots. A single-band effective Hamiltonian together with the configuration interaction theory is implemented to simulate the time evolution of the ground state. We examine spin flips resulting from singlet-triplet transitions driven by external AC electric fields, both near and away from the Pauli blockade regime, revealing fast sub-nanosecond transition times. Furthermore, we analyze the impact of anisotropy by comparing dots arranged along a different crystal axis. The sub-harmonic multi-photon transitions and Landau-Zener-Stückelberg-Majorana transitions are discussed. We show modulation of spin-like and charge-like characteristics of the qubit through potential detuning.

摘要

我们研究了在单层磷烯中通过静电形成的双量子点系统内，由振荡电场诱导产生的电偶极子自旋共振（EDSR）。除了观察到的有效质量的各向异性外，磷烯还被预测会表现出各向异性的自旋 - 轨道耦合。在此，我们研究了一个由两个限制在双量子点中的电子组成的系统。采用单带有效哈密顿量结合组态相互作用理论来模拟基态的时间演化。我们研究了由外部交流电场驱动的单重态 - 三重态跃迁所导致的自旋翻转，无论是在接近还是远离泡利阻塞区域的情况下，都揭示了快速的亚纳秒跃迁时间。此外，我们通过比较沿不同晶轴排列的量子点来分析各向异性的影响。讨论了次谐波多光子跃迁和朗道 - 齐纳 - 施图克尔贝格 - 马约拉纳跃迁。我们展示了通过势能失谐对量子比特的类自旋和类电荷特性的调制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/0d5d2e2018ca/41598_2024_67955_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/69155eb1a82c/41598_2024_67955_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/7d66ae56aa0b/41598_2024_67955_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/9e701e0ac781/41598_2024_67955_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/e983dcd5001d/41598_2024_67955_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/dd0775593c49/41598_2024_67955_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/4c0c5b14e93d/41598_2024_67955_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/f52cc3f3de02/41598_2024_67955_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/0471841961a0/41598_2024_67955_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/7e5efe3fb0c2/41598_2024_67955_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/5e36255e61c4/41598_2024_67955_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/0d5d2e2018ca/41598_2024_67955_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/69155eb1a82c/41598_2024_67955_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/7d66ae56aa0b/41598_2024_67955_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/9e701e0ac781/41598_2024_67955_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/e983dcd5001d/41598_2024_67955_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/dd0775593c49/41598_2024_67955_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/4c0c5b14e93d/41598_2024_67955_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/f52cc3f3de02/41598_2024_67955_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/0471841961a0/41598_2024_67955_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/7e5efe3fb0c2/41598_2024_67955_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/5e36255e61c4/41598_2024_67955_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f67/11329667/0d5d2e2018ca/41598_2024_67955_Fig11_HTML.jpg

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