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Science 19 July 1996:
Vol. 273. no. 5273, pp. 287 - 0
DOI:

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This Week in Science

The mechanism for high-temperature superconductivity in copper oxides is not understood, nor are the properties of the normal states in these materials. Loeser et al. (p. 325) present electron photoemission data that indicate the presence of an energy gap in the normal state of the bismuth-strontium-calcium cuprate compound. As Ong describes in an accompanying Perspective (p. 321), these results may be consistent with a picture in which the singlet spins form pairs prior to the onset of superconductivity.




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