E-Mail IMAGE: The Chirality memory effect of the ferromagnetic domain wall. The chirality of the helical spin structure is memorized in the ferromagnetic domain walls in the ferromagnetic state. view more Credit: Tohoku University Their research was published in the journal Physical Review Letters on April 28, 2021. Chirality is the lack of symmetry in matter. Human hands, for example, express chirality. A mirror image of your right hand differs from your left, giving it two distinguishable chiral states. Chirality is an important issue in a myriad of scientific fields, ranging from high-energy physics to biology. Within our bodies, some molecules, such as amino acids, show only one chiral state. In other words, they are homo-chiral. It is crucial to understand how this information is transferred and memorized.