The researchers observed one-dimensional, charged domain walls in ferroelectric ZrO2. These walls are spatial interfaces separating areas with different polarization directions. The charged character of the walls arises from asymmetry in the structure of the material, where negative and positive charges are separated. Head-to-head and tail-to-tail configurations of 180° domain walls were observed. Oxygen vacuums stabilize these charged walls by offsetting the bound charges. The study proved their presence in thin ZrO2 layers, which is important for nanoelectronics. The main finding is the experimental confirmation of the stability of these one-dimensional structures.[1][2][8]