Hydrostatic pressure on HgBa2CaCu2O 6+δ and HgBa2Ca2Cu3O 8+δ

F. Chen, L. Gao, R. L. Meng, Y. Y. Xue, C. W. Chu

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4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)6941-6943
Number of pages3
JournalJournal of Applied Physics
Volume76
Issue number10
DOIs
Publication statusPublished - 1994

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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