Mantang Chen

Abstract Flat bands in electronic systems have been widely explored for their ability to enhance electronic correlations and to induce exotic quantum states. However, the impact of flat magnon bands in spintronic devices remains largely unexplored. In this study, we experimentally demonstrate that intrinsic magnonic flat bands in the two-dimensional antiferromagnetic insulator CrOCl enable long-range, quasi-one-dimensional magnon transport within a strongly coupled two-dimensional spin lattice.

Urchin-like Covalent Organic Frameworks Templated Au@Ag Composites for SERS Detection of Emerging Contaminants Au@Ag core-shell composites were successfully fabricated on urchin-like covalent organic frameworks (COFs), providing a platform with numerous hot spots for the detection of two categories of emerging contaminants: sulfonamide antibiotics and nanoplastics, using surface-enhanced Raman spectroscopy (SERS).

1. Introduction Serious environmental pollution has attracted increasing attention because of its toxicity and bioaccumulation. It is highly challenging to accurately identify environmental pollutants, especially at trace levels, without pre-treatment procedures. The most popular technique for completely extracting organic chemicals from solid samples is called soxhlet extraction, and it was created in 1879.