Nonthermal Control of CGT Magnetization by Near-Infrared Ultrafast Lasers
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On October 22, 2026, Phys.org reported that an Illinois research team used linearly polarized near-infrared ultrafast lasers to control the magnetization of Cr₂Ge₂Te₆ (CGT) without relying on heating. The polarization, temperature and fluence dependence of terahertz emission agree with a nonlinear Edelstein-Zeeman field model, pointing to a magnetization control mechanism mediated by conduction electrons. The results were published in Nature Communications. Magnetization changes are currently read out indirectly via terahertz emission, and the researchers plan to directly observe their time evolution.
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- Phys.org Optics & PhotonicsPicksUltrafast Laser Controls Cr₂Ge₂Te₆ Ferromagnetism Through Nonthermal Mechanism
A University of Illinois research team used linearly polarized near-infrared ultrafast laser pulses to control the magnetization of Cr₂Ge₂Te₆ (CGT) without relying on heating. The polarization, temperature and optical fluence dependence of the terahertz emission match a nonlinear Edelstein-Zeeman field model, pointing to a magnetization control mechanism mediated by conduction electrons. The results were published in Nature Communications. Magnetization changes are currently read out indirectly via terahertz emission, and the researchers plan to observe their time evolution directly.
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