heavy fermion systems

Heavy fermion systems are special materials where electrons behave as if they have much larger mass than usual, often hundreds of times greater. This happens because electrons strongly interact with each other and with atomic vibrations, creating complex quantum effects. These materials exhibit unusual properties like very high electrical resistance or unconventional superconductivity at low temperatures. Understanding heavy fermions helps scientists explore fundamental physics and develop new technologies, as they demonstrate how quantum interactions can dramatically alter electronic behavior in solids.