Following this work he helped to develop the theory of electronic excitations ( excitons ) in molecular crystals and liquids, eventually moving into the area of radiationless molecular transitions, beginning his own experimental work after the development of the Bixon-Jortner model, while also working with collaborators on extending the theoretical model of these transitions.
32.
In 1954 Rashba was accepted to the Semiconductor Department of the Institute of Physics of the A . F . Ioffe Institute in Leningrad in 1963 for his work on spin-orbit coupling in semiconductors and exciton spectroscopy of molecular crystals ( deducing energy spectra of excitons in pure crystals from optical spectra of mixed crystals, in collaboration with Vladimir Broude ).
