John H. Van Vleck


John Hasbrouck van Vleck

Photo from the Nobel Foundation archive.

John Hasbrouck Van Vleck
The Nobel Prize in Physics 1977

Born: 13 March 1899, Middletown, CT, USA

Died: 27 October 1980, Cambridge, MA, USA

Affiliation at the time of the award: Harvard University, Cambridge, MA, USA

Prize motivation: “for their fundamental theoretical investigations of the electronic structure of magnetic and disordered systems”

Prize share: 1/3


The electrical and magnetic properties of different materials are determined by how the electrons move about in relation to the atomic nucleus. When an atom from a foreign substance is inserted into a crystalline structure, the crystal’s properties can be altered. During the 1930s John Van Vleck developed theories about how electrical fields in a crystal affect a foreign atom and how such an atom can be bound to nearby atoms through its electrons. He also showed how the interaction between the electron’s movements can create local magnetic moments in crystals.

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