Soft phonon mode in the high-Tc superconductor Tl-Ba-Ca-Cu-O
Y. Koyama, H. Hoshiya
DOI 10.1103/PhysRevB.39.7336 · Physical Review B
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Abstract
Thermal diffuse scattering due to a transverse phonon (e∥[010]) propagating along the [100] direction was found in electron-diffraction patterns of Tl-Ba-Ca-Cu-O with Tc of 117 K. The scattering has an intensity maximum at the middle between two fundamental spots along the 〈100〉 directions and its intensity increases with decreasing temperature. That is, the Tl oxide with high Tc exhibits the soft-phonon behavior.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2Ca2Cu3O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 130 | Pressure not reported | onset |
| Tl2Ba2Ca2Cu3O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 117 | Pressure not reported | zero_resistance |
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