摘要
The superconducting transition temperature Tc and its pressure dependence dTc/dP of HgBa2CaCu2O 6+δ (Hg-1212) and HgBa2Ca2Cu 3O8+δ (Hg-1223) were measured up to 17 kbar. T c increases with pressure approximately linearly for both compounds before oxidation. However, the nonlinearity in the Tc-P correlation shows up after oxidation in both compounds. For Hg-1212, the average dT c/dP decreases as oxygen doping increases, while it increases in Hg-1223. These observations are in conflict with the modified pressure-induced charge-transfer model, but might be attributed to the possible existence of fine electronic structure. These observations suggest that a Tc much higher than 140 K might be achievable in Hg-1223 by means of higher physical or chemical pressure.
原文 | English |
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頁(從 - 到) | 6941-6943 |
頁數 | 3 |
期刊 | Journal of Applied Physics |
卷 | 76 |
發行號 | 10 |
DOIs | |
出版狀態 | Published - 1994 |
All Science Journal Classification (ASJC) codes
- 一般物理與天文學