Vortex fluctuations, magnetic penetration depth, and Hc2 in Hg- and Tl-based high-Tc superconductors
J. R. Thompson, J. G. Ossandon, D. K. Christen, B. C. Chakoumakos, Yang Ren Sun, M. Paranthaman, J. Brynestad
DOI 10.1103/PhysRevB.48.14031 · Physical Review B
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Abstract
The presence of strong vortex fluctuation effects in two families of layered high-temperature superconductors (HgBa2CuO4+δ and Tl2Ca2Ba2Cu3O10+δ) is established from experimental studies of the equilibrium magnetization in the mixed state using the theory of Bulaevskii et al. Detailed information is obtained within the framework of this theory on the London penetration depth λab, upper critical field Hc2, and Ginzburg-Landau parameter κab (with magnetic field perpendicular to the copper oxide planes) of these materials.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | onset |
| Tl2Ca2Ba2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 123 | Pressure not reported | onset |
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