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Science 22 December 2006:
Vol. 314. no. 5807, pp. 1888 - 1889
DOI: 10.1126/science.1137173
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Perspectives

PHYSICS:
Gaps and Our Understanding

A. J. Millis

The binding of electrons in pairs within superconductors gives rise to energy gaps. Two studies of gaps may shed light on mechanisms underlying high-temperature superconductivity.

The author is in the Department of Physics, Columbia University, New York, NY 10027, USA. E-mail: millis{at}phys.columbia.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)