Ultrasound studies of the high-Tc superconductor La1.85Sr0.15CuO4

D. J. Bishop, P. L. Gammel, A. P. Ramirez, R. J. Cava, B. Batlogg, E. A. Rietman

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Sound-velocity, attenuation and thermal-expansion measurements are reported on La1.85Sr0.15CuO4. From room temperature to just above Tc the sound velocity is found to soften significantly as the temperature is reduced. At Tc there is a drop of 150 ppm in accord with the thermodynamics of the superconducting transition, and below Tc, as the gap opens, there is a large increase in the sound velocity. The magnitudes of these effects are anomalously large.

Original languageEnglish (US)
Pages (from-to)8788-8790
Number of pages3
JournalPhysical Review B
Issue number16
StatePublished - 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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