Bulk-modulus anomalies at the superconducting transition of single-phase YBa2Cu3O7

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

doi:10.1103/PhysRevB.36.2408

Bulk-modulus anomalies at the superconducting transition of single-phase YBa2Cu3O7

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

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104 Scopus citations

Abstract

We report sound-velocity measurements on polycrystalline single-phase YBa2Cu3O7 with a Tc of 90 K. The sound velocity is found to increase as the temperature is reduced from room temperature in contrast to the decrease observed in La1.85Sr0.15CuO4. At Tc there is no discontinuity in the sound velocity within experimental resolution, as expected from thermodynamic arguments and the small value of dTcdP. As the temperature is lowered below Tc the sound velocity increases at a greater rate. A similar increase below Tc is observed in La1.85Sr0.15CuO4. The magnitude of the sound-velocity increase below Tc is much larger than observed in conventional superconductors.

Original language	English (US)
Pages (from-to)	2408-2410
Number of pages	3
Journal	Physical Review B
Volume	36
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.36.2408
State	Published - 1987
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1103/PhysRevB.36.2408

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title = "Bulk-modulus anomalies at the superconducting transition of single-phase YBa2Cu3O7",

abstract = "We report sound-velocity measurements on polycrystalline single-phase YBa2Cu3O7 with a Tc of 90 K. The sound velocity is found to increase as the temperature is reduced from room temperature in contrast to the decrease observed in La1.85Sr0.15CuO4. At Tc there is no discontinuity in the sound velocity within experimental resolution, as expected from thermodynamic arguments and the small value of dTcdP. As the temperature is lowered below Tc the sound velocity increases at a greater rate. A similar increase below Tc is observed in La1.85Sr0.15CuO4. The magnitude of the sound-velocity increase below Tc is much larger than observed in conventional superconductors.",

author = "Bishop, {D. J.} and Ramirez, {A. P.} and Gammel, {P. L.} and B. Batlogg and Rietman, {E. A.} and Cava, {R. J.} and Millis, {A. J.}",

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doi = "10.1103/PhysRevB.36.2408",

language = "English (US)",

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T1 - Bulk-modulus anomalies at the superconducting transition of single-phase YBa2Cu3O7

AU - Bishop, D. J.

AU - Ramirez, A. P.

AU - Gammel, P. L.

AU - Batlogg, B.

AU - Rietman, E. A.

AU - Cava, R. J.

AU - Millis, A. J.

PY - 1987

Y1 - 1987

N2 - We report sound-velocity measurements on polycrystalline single-phase YBa2Cu3O7 with a Tc of 90 K. The sound velocity is found to increase as the temperature is reduced from room temperature in contrast to the decrease observed in La1.85Sr0.15CuO4. At Tc there is no discontinuity in the sound velocity within experimental resolution, as expected from thermodynamic arguments and the small value of dTcdP. As the temperature is lowered below Tc the sound velocity increases at a greater rate. A similar increase below Tc is observed in La1.85Sr0.15CuO4. The magnitude of the sound-velocity increase below Tc is much larger than observed in conventional superconductors.

AB - We report sound-velocity measurements on polycrystalline single-phase YBa2Cu3O7 with a Tc of 90 K. The sound velocity is found to increase as the temperature is reduced from room temperature in contrast to the decrease observed in La1.85Sr0.15CuO4. At Tc there is no discontinuity in the sound velocity within experimental resolution, as expected from thermodynamic arguments and the small value of dTcdP. As the temperature is lowered below Tc the sound velocity increases at a greater rate. A similar increase below Tc is observed in La1.85Sr0.15CuO4. The magnitude of the sound-velocity increase below Tc is much larger than observed in conventional superconductors.

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Bulk-modulus anomalies at the superconducting transition of single-phase YBa2Cu3O7

Abstract

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