Far-infrared absorption by bulk high-Tc superconductors using an optically pumped CH3OH laser
Etsuo Kawate, Atsushi Onae, Kohtaro Isida, Tsuyoshi Tamegai, Yukinobu Miki, Masahiro Okaji
DOI 10.1103/PhysRevB.43.12976 · Physical Review B
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Abstract
We have developed a far-infrared-absorption-measurement method using an optically pumped far-infrared laser. The temperature dependence of the light absorption by high-Tc superconductors has been investigated for the photon energy between 7.6 and 17.6 meV in the temperature region between 12 and 160 K. A well-defined transition temperature was obtained from the absorption measurement. With decreasing temperature, the absorption decreased, but did not reach zero even at sufficiently low temperatures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | onset |
| Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | onset |
| Bi2Sr2CaCu2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | onset |
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