Observation of phonon softening at the superconducting transition in Bi2Sr2CaCu2O8
H. A. Mook, M. Mostoller, J. A. Harvey, N. W. Hill, B. C. Chakoumakos, B. C. Sales
DOI 10.1103/PhysRevLett.65.2712 · Physical Review Letters
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Abstract
Resonant neutron-absorption spectroscopy has been used to determine the temperature dependence of the average kinetic energy 〈E〉 of the Cu in Bi2Sr2CaCu2O8 for the directions along and perpendicular to the c axis. 〈E〉 is directly related to the Cu phonon density of states and shows essentially normal behavior as a function of temperature for the c-axis direction. However, a sudden drop in 〈E〉 is observed at the superconducting transition for the motions in the Cu-O planes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 83 | Pressure not reported | onset |
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