Source: wikibot/john-hasbrouck-van-vleck
= John Hasbrouck Van Vleck
{wiki=John_Hasbrouck_Van_Vleck}
John Hasbrouck Van Vleck (1899–1980) was an influential American theoretical physicist known for his contributions to quantum mechanics and solid-state physics. He is particularly recognized for his work on the behavior of electrons in solids and the development of theories related to magnetism and superconductivity.