Core Viewpoint - The team from the Institute of Physics, Chinese Academy of Sciences, has successfully discovered one-dimensional charged domain walls in ferroelectric materials with a fluorite structure, providing a scientific basis for the development of devices with extreme density [1] Group 1 - The thickness and width of the discovered domain walls are approximately one hundred thousandths of the diameter of a human hair, indicating a significant advancement in material science [1] - The research findings have been published in the international academic journal "Science" on January 23, 2023, highlighting the importance of this discovery in the scientific community [1]