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

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

doi:10.1063/1.358122

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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Abstract

The superconducting transition temperature T_c and its pressure dependence dT_c/dP of HgBa₂CaCu₂O _6+δ (Hg-1212) and HgBa₂Ca₂Cu ₃O_8+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 T_c-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 T_c much higher than 140 K might be achievable in Hg-1223 by means of higher physical or chemical pressure.

Original language	English
Pages (from-to)	6941-6943
Number of pages	3
Journal	Journal of Applied Physics
Volume	76
Issue number	10
DOIs	https://doi.org/10.1063/1.358122
Publication status	Published - 1994

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.358122

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title = "Hydrostatic pressure on HgBa2CaCu2O 6+δ and HgBa2Ca2Cu3O 8+δ",

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.",

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T1 - Hydrostatic pressure on HgBa2CaCu2O 6+δ and HgBa2Ca2Cu3O 8+δ

AU - Chen, F.

AU - Gao, L.

AU - Meng, R. L.

AU - Xue, Y. Y.

AU - Chu, C. W.

PY - 1994

Y1 - 1994

N2 - 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.

AB - 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.

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Hydrostatic pressure on HgBa₂CaCu₂O _6+δ and HgBa₂Ca₂Cu₃O _8+δ

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