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Science 1 November 1996:
Vol. 274. no. 5288, pp. 697 - 0
DOI: 10.1126/science.274.5288.697b
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When supercooled liquids or polymers are perturbed externally, the return to the original unperturbed state occurs over a spread of relaxation times. This effect could arise through a heterogeneous response, with local domains relaxing at different times, or to an intrinsic complexity in an overall homogeneous response. Schiener et al. p. 752) present direct evidence for a heterogeneous response in the relaxation of supercooled liquids. By selectively modifying the dielectric loss spectrum, they show that spectral holes can be created, leading to characteristic changes in the dielectric response.




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