Strain-modulated ultrafast magneto-optic dynamics of graphene nanoflakes decorated with transition-metal atoms*

Zhang, Yiming; Liu, Jing; Li, Chun; Jin, Wei; Lefkidis, Georgios; Hübner, Wolfgang

doi:10.1088/1674-1056/abeef1

Cited by 3 publications

(2 citation statements)

References 74 publications

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“…The laser-pulse parameters, namely incidence angles, amplitude, frequency, polarization, ellipticity, and chirp, are optimized with our own genetic algorithm [44]. Using such Λ-processes, the spin dynamics on numerous nanostructures, containing not only clusters [45][46][47] but also one-dimensional carbon chains [48][49][50] and 2D systems [51][52][53], has been successfully investigated and proven to be effective.…”

Section: Theory and Methodsmentioning

confidence: 99%

Designing spintronic devices in two-dimensional γ-graphyne: from ultrafast spin dynamics to logic applications

Xu(徐帅),

Xie(谢昊),

Zhang(张一鸣)

et al. 2024

J. Phys. D: Appl. Phys.

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The integration of two-dimensional (2D) materials into spintronics represents a frontier in the development of novel computational devices. In this work, by utilizing ab initio many-body theory, we investigate the spin dynamics within the Co-doped γ-graphyne structure, with a particular emphasis on the role of cobalt atoms as magnetic centers. The result reveals that each cobalt atom on the γ-graphyne hosts states with enough spin-density localization to facilitate both local spin flips and global spin transfers. The spin-dynamic processes in our study are characterized by ultrafast time scales and high fidelities, demonstrating efficient spin control in the system. Building upon these spin dynamics processes, we theoretically construct a spin-based Reset-Set (RS) latch, thus demonstrating the feasibility of sophisticated logic operations in our system. Such spin-based devices exhibit the advantages of nano-spintronics over conventional-electronic approaches, offering lower energy consumption, faster operational speeds, and greater potential for miniaturization. The results highlight the efficacy of γ-graphyne nanoflakes doped with cobalt atoms as spin-information processing units, signifying a pivotal advancement in the incorporation of graphyne-based materials into sophisticated spintronic devices. This research paves the way for their application in areas such as data storage, quantum computing, and the development of complex logic-processing architectures.

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Section: Theory and Methodsmentioning

confidence: 99%

Designing spintronic devices in two-dimensional γ-graphyne: from ultrafast spin dynamics to logic applications

Xu(徐帅),

Xie(谢昊),

Zhang(张一鸣)

et al. 2024

J. Phys. D: Appl. Phys.

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“…In general, there are four considerations when choosing suitable states. − First, both the initial and target states can couple to the same intermediate states under the laser pulse. The second one is that they exhibit a slight asymmetry, allowing individual lasers to address and maintain their ability to interact with each other.…”

mentioning

confidence: 99%

Optically Driven Both Classical and Quantum Unary, Binary, and Ternary Logic Gates on Co-Decorated Graphene Nanoflakes

Zhang,

Xu,

Liu

et al. 2023

J. Phys. Chem. Lett.

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Ultrafast control of laser-induced spin-dynamics scenarios on two-dimensional Ni3@C63H54 magnetic system

Barhoumi,

Liu,

Lefkidis

et al. 2023

The Journal of Chemical Physics

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The concept of building logically functional networks employing spintronics or magnetic heterostructures is becoming more and more popular today. Incorporating logical segments into a circuit needs physical bonds between the magnetic molecules or clusters involved. In this framework, we systematically study ultrafast laser-induced spin-manipulation scenarios on a closed system of three carbon chains to which three Ni atoms are attached. After the inclusion of spin–orbit coupling and an external magnetic field, different ultrafast spin dynamics scenarios involving spin-flip and long-distance spin-transfer processes are achieved by various appropriately well-tailored time-resolved laser pulses within subpicosecond timescales. We additionally study the various effects of an external magnetic field on spin-flip and spin-transfer processes. Moreover, we obtain spin-dynamics processes induced by a double laser pulse, rather than a single one. We suggest enhancing the spatial addressability of spin-flip and spin-transfer processes. The findings presented in this article will improve our knowledge of the magnetic properties of carbon-based magnetic molecular structures. They also support the relevant experimental realization of spin dynamics and their potential applications in future molecular spintronics devices.

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Strain-modulated ultrafast magneto-optic dynamics of graphene nanoflakes decorated with transition-metal atoms*

Cited by 3 publications

References 74 publications

Designing spintronic devices in two-dimensional γ-graphyne: from ultrafast spin dynamics to logic applications

Designing spintronic devices in two-dimensional γ-graphyne: from ultrafast spin dynamics to logic applications

Optically Driven Both Classical and Quantum Unary, Binary, and Ternary Logic Gates on Co-Decorated Graphene Nanoflakes

Ultrafast control of laser-induced spin-dynamics scenarios on two-dimensional Ni3@C63H54 magnetic system

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