PerspectivePhysics

Quasi-Particles Survive--for Now

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Science  25 May 2001:
Vol. 292, Issue 5521, pp. 1498-1499
DOI: 10.1126/science.1061205

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Summary

The concept of quasi-electrons is central to understanding the physical behavior of solids, but the behavior of some materials, especially copper oxide superconductors, seems to be incompatible with this concept. Manganese oxides, the more conventional cousins of the cuprates, have been studied intensively to test the quasi-particle concept. As Keimer explains in his Perspective, the manganites seemed to behave even more strangely than the cuprates, but a report by Chuang et al. now comes to the rescue of the quasi-particles. The case remains open for the cuprates.

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