Compare · Superconductors
HgBa2Ca2Cu3O8+δ (Hg-1223) vs Nb3Sn
RANKED BY CRITICAL TEMPERATURE TC AT AMBIENT PRESSURE (KELVIN)
#1 VS #8
CHECKED 06 SEPT 2026
Side by side
Verdict
HgBa2Ca2Cu3O8+δ (Hg-1223) ranks #1 of 8 on Critical temperature Tc at ambient pressure (kelvin) (135 K); Nb3Sn ranks #8 (18.3 K).
Rank 01 of 8 · leads
Critical temperature Tc at ambient pressure (kelvin)
135 K
MakerChu / Schilling groups
Date1993
Verified04 Sept 2026
Evidence
Ambient-pressure record in the cuprate family. Huang, Meng, Chu et al., Physica C 217 (1993): resistivity vanishes below 134 K after oxygenation; Nature 365, 323 (1993) then reports the same compound above 150 K only under high pressure. Later single-crystal work optimises Tc max to 133 K. npj Quantum Materials (2025) still treats Tc ≈ 134 K as the ambient-pressure record. Ranking uses the long-replicated ~135 K ambient figure, not the pressure result.Rank 08 of 8
Critical temperature Tc at ambient pressure (kelvin)
18.3 K
MakerMatthias / Bell Labs
Date1954
Verified04 Sept 2026
Evidence
Matthias, Geballe, Geller, Corenzwit, Phys. Rev. 95, 1435 (1954): superconductivity in Nb3Sn near 18 K. Modern wire-grade Nb3Sn is quoted at 18.0–18.3 K ambient. Still the workhorse A15 conductor for high-field magnets.Try another pair
More HgBa2Ca2Cu3O8+δ (Hg-1223) matchups
Source Peer-reviewed papers: Nature 365, 323 (1993); Phys. Rev. Lett. 60, 2539 (1988); Jpn. J. Appl. Phys. 27, L209 (1988); Chin. Phys. Lett. 25,…
Last checked 06 Sept 2026