Superconductivity above 130 K in the Hg–Ba–Ca–Cu–O system

@article{Schilling1993SuperconductivityA1,
  title={Superconductivity above 130 K in the Hg–Ba–Ca–Cu–O system},
  author={Andreas Schilling and Marco Cantoni and J D Guo and H. R. Ott},
  journal={Nature},
  year={1993},
  volume={363},
  pages={56-58}
}
THE recent discovery1 of superconductivity below a transition temperature (Tc) of 94 K in HgBa2CuO4+δ has extended the repertoire of high-Tc superconductors containing copper oxide planes embedded in suitably structured (layered) materials. Previous experience with similar compounds containing bismuth and thallium instead of mercury suggested that even higher transition temperatures might be achieved in mercury-based compounds with more than one CuO2 layer per unit cell. Here we provide support… Expand
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TLDR
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TLDR
A systematic study of the pressure dependence of Tc in HgBa2Ca2Cu3O8+δ (Hg1212) and Hg1223 with the doping level from underdoped to overdoped is reported and a maximum Tc of 153 K at 22 GPa is confirmed in slightly underdoping Hg 1223. Expand
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References

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Superconductivity at 94 K in HgBa2Cu04+δ
FOLLOWING the discovery1 of high-transition-temperature (high-Tc) superconductivity in doped La2CuO4, several families of related compounds have been discovered which have layers of CuO2 as the… Expand
Bulk Superconductivity at 125 K in Tl 2 Ca 2 Ba 2 Cu 3 O x
Bulk superconductivity is reported in T12Ca2 Ba2 Cu3 Ox with a transition to zero resistance at ≃ 125 K, the highest transition temperature (Tc) yet found. Transmission electron spectroscopy shows… Expand
Zero-resistance temperature of Tl-based “2223” superconductor increased to 127 K
Abstract It is demonstrated that a single-phase “2223” superconductor, i.e. Tl 1.7 Ba 2 Ca 2.3 Cu 3 O z , exhibits the zero-resistance temperature at 127 K and the diamagnetic onset temperature at… Expand
Stabilization of superconductivity in TlBa2CuO5−δ at 9.5 K and its enhancement to 43 K in TlBaSrCuO5−δ
Abstract It is shown that the superconducting state can be stabilized ( T c =9.5 K) by slow-cooling TlBa 2 CuO 5 in a nitrogen environment. Interestingly, partial substitution (50%) of Ba 2+ by Sr +… Expand
Tl1Can−1Ba2CunO2n+3 (n= 1,2,3): a new class of crystal structures exhibiting volume superconductivity at up to ≃ 110 K
We report the discovery of three new phases in the Tl-Ca-Ba-Cu-O system, Tl/sub 1/Ca/sub n//sub -1/Ba/sub 2/Cu/sub n/O/sub 2//sub n//sub +3/ (n = 1,2,3), one of which (n = 3) exhibits bulk… Expand
Bulk superconductivity at 125 K in Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub x/
Bulk superconductivity is reported in Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub x/ with a transition to zero resistance at approx. =125 K, the highest transition temperature (T/sub c/) yet found.… Expand
New complex copper oxides: HgBa2RCu2O7 (R = La, Nd, Eu, Gd, Dy, Y)
Abstract A new family of complex copper oxides, HgBa 2 R Cu 2 O 7 ( R = La, Nd, Eu, Gd, Dy, Y), has been synthesized and studied by X-ray powder diffraction, transmission electron microscopy and EDS… Expand