Superconductivity up to 164 K in HgBa2Cam-1CumO2m+2+δ (m=1, 2, and 3) under quasihydrostatic pressures

L. Gao, Y. Y. Xue, F. Chen, Q. Xiong, R. L. Meng, D. Ramirez, C. W. Chu, J. H. Eggert, H. K. Mao

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Abstract

The superconducting transition temperatures (Tc's) of optimally doped HgBa2Cam-1CumO2m+2+δ (Hg 1:2:m-1:m) with m=1, 2, and 3 and Hg1-xPbxBa2Ca2Cu3O8+δ [Hg(xPb) 1:2:2:3] have been investigated resistively under quasihydrostatic pressures up to 45 GPa. There seems to be a universal upward shift of Tc under pressure, regardless of m, for all Hg 1:2:m-1:m, implying a common origin for all compounds. Record high Tc's of 164, 154, and 118 K were reached for the optimally doped Hg 1:2:m-1:m with m=3, 2, and 1, respectively. However, the Tc enhancement is suppressed by Pb substitution, suggesting the possibility that Hg plays an important role in these compounds.

Original languageEnglish
Pages (from-to)4260-4263
Number of pages4
JournalPhysical Review B
Volume50
Issue number6
DOIs
Publication statusPublished - 1994

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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