For the first time, scientists have observed a collection of particles, also known as a quasiparticle, that's massless when moving one direction but has mass in the other direction. The quasiparticle, ...

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 made a satisfying and intriguing physics discovery some 16 years after it was first predicted to be a possibility: a quasiparticle (a group of particles behaving as one) that only has ...

For 16 years, scientists hypothesized the existence of a quasi-particle called a semi-Dirac fermion, named after mathematician Paul Dirac whose eponymous equation describes these fermions. Now, a new ...

Quantum Electrodynamics (QED) examines the fusion of quantum mechanics and electromagnetism, moving beyond classical theories ...

One of the most fundamental interactions in physics is that of electrons and light. In an experiment, scientists have now managed to observe what is known as the Kapitza-Dirac effect for the first ...

At the heart of Dirac materials' unique properties is the Dirac cone, a linear dispersion of the electronic band structure near the Fermi level. This feature results in electrons moving through the ...