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<p>in developing the theory of <a href="page.php?w=superconductivity">superconductivity</a>.</p>

<p><big> Research and career </big></p>
<p>Schrieffer recalled that in January 1957 he was on a subway in New York City when he had an idea of how to describe mathematically the ground state of superconducting <a href="page.php?w=electron">electron</a>s. Schrieffer and Bardeen's collaborator Cooper had discovered that electrons in a superconductor are grouped in pairs, now called <a href="page.php?w=Cooper_pair">Cooper pair</a>s, and that the motions of all</p><p>
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