Significant electron-magnon scattering in layered ferromagnet Cr${}_2$Te${}_3$

Abstract

A layered ferromagnet Cr${}_2$Te${}_3$ is attracting growing interest because of its unique electronic and magnetic properties. Studies have shown that it exhibits sizable anomalous Hall effect (AHE) that changes sign with temperature. The origin of the AHE and the sign change, however, remains elusive. Here we show experimentally that electron-magnon scattering significantly contributes to the AHE in Cr${}_2$Te${}_3$ through magnon induced skew scattering, and that the sign change is caused by the competition with the Berry-curvature or impurity-induced side-jump contribution. The electron-magnon skew scattering is expected to arise from the exchange interaction between the itinerant Te $p$-electrons and the localized Cr $d$-electrons modified by the strong spin-orbit coupling on Te. These results suggest that the magnon-induced skew scattering can dominate the AHE in layered ferromagnets with heavy elements.

References in corpus (17)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Anomalous Hall effect
• Magnetic 2D materials and heterostructures
• Proper Scaling of the Anomalous Hall Effect
• Critical suppression of spin Seebeck effect by magnetic fields
• Multivariable Scaling for the Anomalous Hall Effect
• Radial spin texture in elemental tellurium with chiral crystal structure
• ZrTe2/CrTe2: an epitaxial van der Waals platform for spintronics
• Giant Topological Hall Effect in van der Waals Heterostructures of CrTe2/Bi2Te3
• Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride
• Antiferromagnetism in the van der Waals layered spin-lozenge semiconductor CrTe3
• Tailoring Magnetism in Self-intercalated Cr1+δTe2 Epitaxial Films
• Covalent 2D Cr${}_2$Te${}_3$ ferromagnet
• Anomalous Hall effect in trigonal Cr${}_5$Te${}_8$ single crystal
• Observation of colossal topological Hall effect in noncoplanar ferromagnet Cr5Te6 thin films
• Scaling of anomalous Hall effect in ferromagnetic thin films