Anomalous behavior of phonons in superconducting Tl2Ba2Ca2Cu3O10 detected by far-infrared spectroscopy
T. Zetterer, M. Franz, J. Schützmann, W. Ose, H. H. Otto, K. F. Renk
DOI 10.1103/PhysRevB.41.9499 · Physical Review B
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Abstract
We report anomalous behavior of phonons in superconducting Tl2Ba2Ca2Cu3O10 at Tc(∼112 K) detected by a far-infrared reflectivity study of a ceramic sample. Our results indicate strong and abrupt softening of an infrared-active phonon and a decrease of oscillator strength of this and of another phonon. We associate the effects with anomalous vibrations of the bridging oxygen in the BaO layers and the off-center oxygen in the TlO layers, respectively. Our results give experimental evidence for strong electron-phonon interaction.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 112 | Pressure not reported | zero_resistance |
| Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 118 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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