Stable organic radical qubits and their applications in quantum information science

Zhou, Aimei; Sun, Zhecheng; Sun, Lei

doi:10.1016/j.xinn.2024.100662

The Innovation

2024

DOI: 10.1016/j.xinn.2024.100662

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Stable organic radical qubits and their applications in quantum information science

Aimei Zhou,

Zhecheng Sun,

Lei Sun

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2024

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Cited by 4 publications

References 200 publications

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Effect of Lanthanum‐Aluminum Co‐Doping on Structure of Hafnium Oxide Ferroelectric Crystals

Li,

Tang,

Wang

et al. 2024

Advanced Science

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Hafnium oxide (HfO2)‐based devices have been extensively evaluated for high‐speed and low‐power memory applications. Here, the influence of aluminum (Al) and lanthanum (La) co‐doping HfO2 thin films on the ferroelectric characteristics of hafnium‐based devices is investigated. Among devices with different La/Al ratios, the Al and La co‐doped hafnium oxide (HfAlAO) device with 4.2% Al and 2.17% La exhibited the excellent remanent polarization and thermostability. Meanwhile, first principal analyses verified that hafnium‐based thin films with 4.2% Al and 2.17% La promoted the formation of the o‐phase against the paraelectric phase, providing theoretical support for supporting experimental results. Furthermore, a vertical ferroelectric HfO2 memory based on 3D macaroni architecture is reported. The devices show excellent ferroelectric characteristics of 22 µC cm−2 under 4.5 MV cm−1 and minimal coercive field of ≈1.6 V. In addition, the devices exhibit great memory performance, including the response speed of device can achieve 20 ns and endurance characteristic can achieve 1010 cycles.

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Effect of Lanthanum‐Aluminum Co‐Doping on Structure of Hafnium Oxide Ferroelectric Crystals

Li,

Tang,

Wang

et al. 2024

Advanced Science

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Fluoride Clusterfullerenes: Tuning Metal–Metal Bonding and Magnetic Properties via Single Fluorine Atom Doping

Shen,

Roselló,

Abella

et al. 2024

J. Am. Chem. Soc.

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Endohedral fullerenes are known for their exceptional ability to host metal clusters that contain unique bonding motifs. In this study, we report a facile strategy to synthesize a new family of clusterfullerenes, fluoride clusterfullerenes (FCFs). This work demonstrates that actinides and rare earth metals as well as alkaline earth metals can be encapsulated within a variety of fullerene cages, and these fullerenes can be obtained in their pristine form without additional functionalization methods. Notably, Th 2 F@I h (7)-C 80 and CaScF@C s (6)-C 82 were isolated and their molecular structures and magnetic properties were characterized by X-ray single-crystal diffraction and multiple spectroscopic techniques as well as DFT calculations. These findings reveal that the unique internal addition of a single fluorine atom significantly alters the metal−metal bonding interactions of Th−Th and Ca−Sc. While Th 2 @I h (7)-C 80 hosts a σ 2 Th−Th bond, an unprecedented actinide−actinide (Th−Th) single electron metal−metal bond is formed inside Th 2 F@I h (7)-C 80 upon the internal addition of fluoride. Similarly, while a Ca−Sc single electron bond exists in CaSc@C s (6)-C 82 , which exhibits excellent molecular qubit properties, the addition of fluoride transforms the compound into a singlet. The present study not only highlights the successful synthesis of a novel family of FCFs, which will likely be an extensive family, it also shows that fluorine doping can induce novel metal−metal bonding motifs leading to potentially intriguing magnetic properties.

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Unlocking the potential of photoexcited molecular electron spins for room temperature quantum information processing

Chen,

Collauto,

Rogers

et al. 2024

Mater. Quantum. Technol.

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Future information processing technologies like quantum memory devices have the potential to store and transfer quantum states to enable quantum computing and networking. A central consideration in practical applications for such devices is the nature of the light-matter interface which determines the storage state density and efficiency. Here, we employ an organic radical, $\alpha$,$\gamma$-bisdiphenylene-$\beta$-phenylallyl (BDPA) doped into an o-terphenyl host to explore the potential for using tuneable and high-performance molecular media in microwave-based quantum applications. We demonstrate that this radical system exhibits millisecond-long spin-lattice relaxation and microsecond-long phase memory times at room temperature, while also having the capability to generate an oscillating spin-polarized state using a co-dissolved photo-activated tetraphenylporphyrin moiety, all enabled by using a viscous liquid host. This latest system builds upon collective wisdom from previous molecules-for-quantum literature by combining careful host matrix selection, with dynamical decoupling, and photoexcited triplet-radical spin polarisation to realise a versatile and robust quantum spin medium.

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Stable organic radical qubits and their applications in quantum information science

Cited by 4 publications

References 200 publications

Effect of Lanthanum‐Aluminum Co‐Doping on Structure of Hafnium Oxide Ferroelectric Crystals

Effect of Lanthanum‐Aluminum Co‐Doping on Structure of Hafnium Oxide Ferroelectric Crystals

Fluoride Clusterfullerenes: Tuning Metal–Metal Bonding and Magnetic Properties via Single Fluorine Atom Doping

Unlocking the potential of photoexcited molecular electron spins for room temperature quantum information processing

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