A theoretical physicist who identified electron-phonon interaction as a promising basis for understanding superconductivity. In 1950, his independent theoretical proposal and the experimental superconducting isotope effect directed attention to lattice vibrations as part of the mechanism. This helped explain why understanding electron motion alone was insufficient: the response of the surrounding crystal also affects electronic behavior.[ref]
Electron-Phonon Interactions and Superconductivity by John Bardeen. Section 1, introduction: 1950 isotope-effect discovery and Fröhlich's independent proposal
