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

  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},
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… 
Superconductivity at higher temperatures in the Hg-Ba-Ca-Cu-O compound system
Our recent systematic examination of the pressure effect on high-temperature superconductors revealed that the highest achievable superconducting transition temperature (Tc) in the layered cuprates
High current densities above 100 K in the high-temperature superconductor HgBa2CaCu2O6+δ
THE recent discovery1,2 of a family of mercury-based copper oxide superconductors having transition temperatures1–3 above 130 K is of considerable technological interest. But the viability of
Physical and structural aspects of the 130 K superconductor in the Hg-Ba-Ca-Cu-O system
Samples containing HgBa2Ca2Cu3O8+δ (Hg-1223) as the main phase were investigated. Our specific-heat results confirm the bulk nature of superconductivity below T c ≈ 133 K. From the location of the
Pressure-Induced Enhancement of Tc Above 150 K in Hg-1223
Temperature-dependent electrical resistivity measurements under pressure on a (> 95%) pure Hg-1223 phase are reported and strongly suggests that higher critical temperatures could be obtained at atmospheric pressure.
Preparation and superconducting properties of the (Cu,C)Ba2Ca3Cu4O11+y films with zero-resistance transition temperature of 96 K
(Cu,C)Ba2Ca3Cu4O11+y is a nontoxic cuprate system with a superconducting transition temperature (Tc) of about 117 K for bulk samples. Recently, it is found that the bulk samples of this material
Superconductivity above 100 K in compounds containing Hg
The results of studies of new Hg based cuprate superconductors are reported. Several members of a new family of (Hg,Tl)(Ba,Sr)Can−2CunOx high temperature superconductors have been synthesized. These
Synthesis and Superconductivity of Hg-Ba-Ca-Cu-O Superconductors
The compositions, crystal structures and superconducting properties of Hg-Ba-Ca-Cu-O superconductors were investigated. Nearly single-phase samples of HgBa2CuO4+ δ (Hg-1201) and HgBa2CaCu2O6+ δ
High pressure effects revisited for the cuprate superconductor family with highest critical temperature
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.


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
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
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
Bulk superconductivity at 125 K in Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub x/
  • 1988