Scientists have observed a unique particle that moves easily one way, yet resists at 90 degrees. These semi-Dirac fermions were observed using their energy signature in a topological metal. Particles ...

Scientists have observed a unique particle that moves easily one way, yet resists at 90 degrees. These semi-Dirac fermions were observed using their energy signature in a topological metal. Particles ...

Atoms contain three types of smaller particles: protons, neutrons and electrons. An electric current is a flow of charged particles in one direction. A source of energy, such as a cell or battery, is ...