AI Article Synopsis
- The research investigates how manipulating spin-phonon coupling in two-dimensional van der Waals ferromagnetic semiconductors can enhance magnetism, opening new possibilities for spintronic devices.
- The study uses tetrabutyl ammonium (TBA) as an intercalant to show its effects on the magnetic and electronic properties of CrGeTe, revealing increased ferromagnetic Curie temperature through temperature evolution of Raman modes and magnetization measurements.
- The findings point to significant electron transfer from TBA to Cr, emphasizing the importance of spin-phonon interaction and magnetic ordering in understanding and controlling magnetism in layered structures.
Article Abstract
The manipulation of spin-phonon coupling in both formations and explorations of magnetism in two-dimensional van der Waals ferromagnetic semiconductors facilitates unprecedented prospects for spintronic devices. The interlayer engineering with spin-phonon coupling promises controllable magnetism via organic cation intercalation. Here, spectroscopic evidence reveals the intercalation effect on the intrinsic magnetic and electronic transitions in quasi-two-dimensional CrGeTe using tetrabutyl ammonium (TBA) as the intercalant. The temperature evolution of Raman modes, and , along with the magnetization measurements, unambiguously captures the enhancement of the ferromagnetic Curie temperature in the intercalated heterostructure. Moreover, the mode highlights the increased effect of spin-phonon interaction in magnetic-order-induced lattice distortion. Combined with the first-principle calculations, we observed a substantial number of electrons transferred from TBA to Cr through the interface. The interplay between spin-phonon coupling and magnetic ordering in van der Waals magnets appeals for further understanding of the manipulation of magnetism in layered heterostructures.
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| http://dx.doi.org/10.1021/acs.nanolett.4c00976 | DOI Listing |
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