Phys.org October 11, 2024 Researchers in Japan visualized antiferromagnetic domains in a representative quasi-one-dimensional antiferromagnet using nonreciprocal directional dichroism, which differentiated the optical absorption of a pair of antiferromagnetic domains. Opposite antiferromagnetic domains, each about submillimeter in size, were found to coexist in a single-crystal specimen, and the domain walls ran predominantly along the spin chains. They showed that the domain walls could be moved by an applied electric field through a magnetoelectric coupling, and the direction of the domain walls was maintained during the motion. They explained the domain wall anisotropy by the quasi-one-dimensional nature of the exchange interactions. […]
Tag Archives: Quantum material
Graphene-hBN breakthrough to spur new LEDs, quantum computing
Science Daily April 14, 2022 Graphene-hBN structures can power LEDs that generate deep-UV light, which is impossible in today’s LEDs. Previous efforts to get ordered rows of hBN atoms that align with the graphene underneath were not successful. A team of researchers in the US (University of Michigan, Ohio State University, Yale University) discovered that neat rows of hBN atoms are more stable at high temperature than the undesirable jagged formations. They used a terraced graphene substrate and heated it to around 1600 degrees Celsius before spraying on individual boron and active nitrogen atoms resulting in neatly ordered seams of […]