“Totally Unexpected” – Scientists Stumble Upon a Bizarre Particle That Defies the Rules

Semi-Dirac fermions, massless in one direction and massive in another, were discovered in ZrSiS crystals, offering exciting potential for technological and quantum breakthroughs. For the first time, scientists have observed a quasiparticle—referred to as a semi-Dirac fermion—that behaves uniquely: it is massless when moving in one direction but possesses mass when moving in another. First [...]