2025/06/06 by Hao Deng, Jue-Yi Qi, Deng, Hao +6
Materials Science · Physics and Astronomy · #Quasicrystal Structures and Properties #Advanced Chemical Physics Studies #X-ray Diffraction in Crystallography
paper · pdf · doi:10.48550/arxiv.2506.05684
Nonanalytic chemical short-range order (SRO) has long been observed in diffuse scattering experiments for metallic alloys. However, considerable debate surrounds the validity of these observations due to the unresolved nature of the nonanalyticity. Using prototypical face-centered cubic alloys as an example, here we demonstrate that SRO in metallic alloys is mostly nonanalytic at Γ. The nonanalyticity stems from the elastic anisotropy and long-range atomic interactions of the host lattice. The physical insights substantially improve our understanding of chemical order in alloys and resolves the long-standing debate in the field. Nonanalytic SRO is expected to be general in alloys and the nonanalyticity may serve as a unique feature to verify the intensely debated existence of SRO in compositionally complex alloys.