When was the  Soviet, Russian and American theoretical physicist died who describe the magnetic phase diagram of type-II superconductors of Onsager?
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. He was awarded the Nobel Prize in Physics in 2003.
Gordon Walter Semenoff Gordon Walter Semenoff (born July 11, 1953), {'1': ", '2': ", '3': ", '4': "} , {'1': ", '2': ", '3': ", '4': "} , is a theoretical physicist and Professor of Physics at the University of British Columbia, Canada. He is known for his research on quantum mechanics, quantum field theory, statistical mechanics and string theory and is particularly famous for his co-invention, together with Antti Niemi, of the parity anomaly in odd-dimensional gauge field theories and for his pioneering work on graphene. He is also well known for development of thermal field theory, the application of index theorems and their generalizations in quantum field theory and string theory, notably with respect to the duality between string theories and gauge field theories.