Calorimetric evidence of multiband superconductivity in Ba(Fe0.925Co0.075)2As2 single crystals
F. Hardy, T. Wolf, R. A. Fisher, R. Eder, P. Schweiss, P. Adelmann, H. v. Löhneysen, C. Meingast
DOI 10.1103/PhysRevB.81.060501 · Physical Review B
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Abstract
We report on the determination of the electronic heat capacity of a slightly overdoped (x=0.075) Ba(Fe1−xCox)2As2 single crystal with a Tc of 21.4 K. Our analysis of the temperature dependence of the superconducting-state specific heat provides strong evidence for a two-band s-wave order parameter with gap amplitudes 2Δ1(0)/kBTc=1.9 and 2Δ2(0)/kBTc=4.4.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(Fe0.925Co0.075)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21.4 | Pressure not reported | onset |
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