Critical magnetic fields of superconducting Ba6C60
V. Korenivski, K. V. Rao, Z. Iqbal
DOI 10.1103/PhysRevB.50.13890 · Physical Review B
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Abstract
We have measured the upper and lower critical fields of superconducting Ba6C60. Near Tc, from the slope of the measured upper critical field, dHc2/dT=0.45 T/K, we obtain the zero-temperature Ginzburg-Landau coherence length as ξGL=120 Å. Using the lower critical-field data, the penetration depth at T=0 is estimated to be λ(0)=1800 Å. Combining λ(0) with the value of ξGL, we estimate the Fermi energy EF to be =0.15 eV. Thus, in comparison with the alkali-metal-doped fullerenes, the superconducting parameters Hc2, ξGL, and the resulting Ginzburg-Landau parameter κ, are significantly different in the case of the superconducting Ba-doped fullerene.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba6C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | onset |
| K3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19.3 | Pressure not reported | unknown |
| Rb3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29.6 | Pressure not reported | unknown |
| Ca5C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.4 | Pressure not reported | unknown |
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