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Published on: June 28, 2018
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Ultrafast Laser-Induced Spin Dynamics in All-Semiconductor Ferromagnetic CrSBr-Phosphorene Heterostructures
1School of Physics, State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, China.
The Journal of Physical Chemistry Letters
|January 13, 2025
Summary
We computationally investigated ultrafast spin transfer in ferromagnetic-nonmagnetic van der Waals heterostructures using femtosecond laser pulses. Spin injection from CrSBr to phosphorene occurs in femtoseconds, controllable by laser fluence for spintronic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Optics
Background:
- Two-dimensional van der Waals (vdW) heterostructures enable efficient interfacial spin injection.
- Physical processes of photoinduced spin transfer dynamics in all-semiconductor ferromagnetic vdW heterostructures are not well understood.
Purpose of the Study:
- To computationally investigate ultrafast, electron-mediated spin transfer dynamics in a CrSBr-phosphorene vdW heterostructure induced by femtosecond laser pulses.
- To explore the influence of laser pulse parameters on spin transfer and demagnetization.
Main Methods:
- Computational investigation of spin transfer dynamics.
- Simulation of femtosecond laser pulse interactions with a CrSBr-phosphorene vdW heterostructure.
- Analysis of electron-mediated spin transfer on a sub-50 femtosecond timescale.
Main Results:
- Observed ultrafast spin injection from Cr atoms to P atoms within femtoseconds.
- Demonstrated optically induced and interfacial atom-mediated spin transfer effects.
- Showed sensitive manipulation of demagnetization and spin transfer by varying laser fluences.
Conclusions:
- Provided a microscopic understanding of spin dynamics in ferromagnetic-nonmagnetic vdW heterostructures.
- Highlighted the potential for optically controlled spin transfer in spintronic applications.
- Established CrSBr-phosphorene as a promising system for ultrafast spintronics.
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