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

D. J. Bishop, P. L. Gammel, A. P. Ramirez, Robert Joseph 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 - Jan 1 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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    Bishop, D. J., Gammel, P. L., Ramirez, A. P., Cava, R. J., Batlogg, B., & Rietman, E. A. (1987). Ultrasound studies of the high-Tc superconductor La1.85Sr0.15CuO4. Physical Review B, 35(16), 8788-8790. https://doi.org/10.1103/PhysRevB.35.8788