Abstract
This article discusses high-temperature superconductors. In the 18 years since they were discovered, high-temperature superconductors have remained an enigma. These copper oxide ceramics conduct electricity without loss at temperatures far higher than those needed for conventional superconductors, albeit still far below room temperature. Physicists know that in both types of material, the superconductivity is caused by electrons pairing up and gathering en masse in a single collective quantum state. In low-temperature superconductors, the crucial interaction among the electrons is mediated by vibrations of the metal's lattice of positive ions. The physicists, led by Thomas Timusk of McMaster, found both a sharp peak in scattering at a particular frequency and a broad background of scattering across all frequencies.
Published Version
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