Abstract
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 language | English (US) |
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Pages (from-to) | 8788-8790 |
Number of pages | 3 |
Journal | Physical Review B |
Volume | 35 |
Issue number | 16 |
DOIs | |
State | Published - Jan 1 1987 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics