Observation of helimagnetism in the candidate ferroelectric CrI
arXiv:2310.12120 · doi:10.1103/PhysRevB.109.144403
Abstract
CrI is a quasi-one dimensional (1D) van der Waals (vdW) system that exhibits helimagnetism that propagates along the ribbons. This was determined from neutron time-of-flight diffraction measurements. Below K, a screw-like helimagnetic order develops with an incommensurate wavevector of at 8 K. Using density functional theory (DFT) calculations, the - model was leveraged to describe the helimagnetism, where and correspond, respectively, to a ferromagnetic nearest neighbor (NN) and antiferromagnetic next-nearest neighbor (NNN) intrachain interaction. The DFT calculations predict that bulk CrI in the orthorhombic crystal structure satisfies the condition, which favors formation of helimagnetic order.
arXiv commentmain pdf file includes supplement
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