One-Way Transfer of Magnetic Fields

Researchers have created a material that acts as a magnetic diode, transferring magnetism from one object to another but not the other way around. An electric current flowing through a coil of copper wire induces a magnetic field in the coil. This magnetic field can then transfer to a nearby magnetic object, such as a second coil of wire. The laws of electromagnetism, and experimental…

Anisotropic Spin Currents in Graphene

Graphene’s exceptional electrical conductance makes it a prime target for spintronics technologies, which exploit the spin of the electron for data storage and transfer. However, it’s hard to manipulate the spins of graphene’s electrons because of weak spin-orbit coupling—the coupling between an electron’s spin and its motion. Researchers have circumvented this problem by placing graphene layers on transition-metal dichalcogenide (TMD) materials with strong spin-orbit coupling.…