Public Research Seminar by Advanced Materials (AMAT) Thrust, HKUST(GZ) - Investigate Two-Dimensional Magnetism via Lattice Engineering

Manipulating the spin degree of freedom (DoF) is essential for tackling profound questions in the realm of fundamental magnetism and spearheading transformative advancements in modern electronics. The advent of two-dimensional (2D) magnetic crystals has unveiled a novel platform for investigating spin control through an array of external stimuli. A pivotal insight from this breakthrough is that the stacking symmetry between adjacent layers governs the interlayer magnetic coupling in naturally exfoliated 2D magnets. This revelation has ignited enthusiasm for engineering 2D magnetism via lattice degrees of freedom, pursued through both uniform and periodically modulated approaches.
In this talk, I will elaborate on our recent endeavors and achievements in detecting and designing spin configurations within 2D structures by leveraging lattice DoF. I will begin by presenting our findings on the detection and manipulation of magnetic states using mechanical resonators constructed from 2D magnets. This methodology paves the way for exciting possibilities in the nano-mechanical detection of emergent magnetic states and phase transitions within 2D systems. Subsequently, I will delve into our pioneering success in moiré engineering of 2D magnetism, achieved by twisting two layered antiferromagnets. This approach has demonstrated unparalleled potential for crafting intricate spin textures at the moiré length scale, enriching our understanding and control of magnetic phenomena in reduced dimensions.