Question: In what year did a Soviet, Russian, and American theoretical physicist, whose main contributions are in the field of condensed matter physics, come up with his famous theory?
Sentence (from "Alexei Alexeyevich Abrikosov"): Alexei Alexeyevich Abrikosov (Russian: Алексе́й Алексе́евич Абрико́сов ; 25 June 1928 – 29 March 2017) was a Soviet, Russian and American theoretical physicist whose main contributions are in the field of condensed matter physics.
Relevant evidence: Yes