John Bardeen

Nobel Prize in Physics 1956

“for their researches on semiconductors and their discovery of the transistor effect; for their jointly developed theory of superconductivity, usually called the BCS-theory”

John Bardeen was an American physicist and electrical engineer. He won the Nobel Prize in Physics in 1956 for research on semiconductors and the discovery of the transistor effect, and again in 1972 for the BCS theory of superconductivity.