WebAug 3, 2024 · Our work highlights that Raman modes are highly sensitive to weak interlayer exchange coupling in CrI3, proving a diffraction-limited and non-contact technique to … WebSep 22, 2024 · a Raman spectrum of bilayer CrI 3 acquired in the linearly crossed polarization channel at 40 K using a 633 nm laser. Insets show 1st-order single-phonon modes (linear parallel/crossed, i.e.,...
Direct observation of two-dimensional magnons in …
WebJan 8, 2024 · Here we demonstrate that the Raman polarization selection rules of optical phonons can be greatly modified by the magnetic ordering in 2D magnet CrI 3. For monolayer samples, the dominant A 1g peak shows an abnormally high intensity in the cross-polarization channel at low temperatures, which is forbidden by the selection rule … WebMay 23, 2024 · Here we present Raman characterization of CrI3, and demonstrate that the main degradation pathway of CrI3 is the photocatalytic substitution of iodine by water. … gac fiat chrysler automobiles co. ltd
Direct observation of two-dimensional magnons in
WebMagnons are collective spin excitations in crystals with long-range magnetic order. The emergent van der Waals magnets1–3 provide a highly tunable platform to explore magnetic excitations in the... WebAug 3, 2024 · Polarization-dependent Raman at zero magnetic field. A thin flake of CrI 3 (≈7 nm from atomic force microscopy, or ≈10 layers) was encapsulated between two 20 nm and 30 nm flakes of hBN using the dry transfer technique 22, 23.In the ab plane, the Cr 3+ atoms are arranged in a honeycomb lattice, where each chromium atom is bonded with six … WebOur data show a clear gap opening in the magnon bands at the K points, with the gap size of about 2 and 5 meV for CrSiTe 3 and CrGeTe 3, respectively. The magnon band dispersion in CrXTe 3 can be described … gac fiat china