John Hasbrouck van Vleck
John Hasbrouck Van Vleck (
1899–
1980) was an
American physicist. As a
professor at
Harvard, Van Vleck developed fundamental theories on the
quantum mechanics of
magnetism and on molecular bonding (ligand field theory). For his contributions to the understanding of
electrons in magnetic, noncrystalline solids, Van Vleck was awarded the
1977 Nobel Prize in Physics, along with Philip W. Anderson and Sir Nevill Mott.
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