Phys.org  April 20, 2020 Antiferromagnetic materials seem harder to work with but have many useful properties and they are less subject to external magnetic fields due to a unique arrangement of their constituent parts making it harder to manipulate the material as needed. According to researchers in Japan in antiferromagnetic manganese-tin alloy Mn3Sn Weyl fermions exist at Weyl points in momentum space. They have two possible states that could represent binary digits. They found that it is possible to switch a Weyl point between these states with an external electrical current applied to neighboring thin layers of Mn3Sn and either […]