Extended Data Fig. 3: Superconducting properties of the C–S–H system. | Nature

Extended Data Fig. 3: Superconducting properties of the C–S–H system.

From: Room-temperature superconductivity in a carbonaceous sulfur hydride

Extended Data Fig. 3

a, Coherence length versus temperature. b, Temperature dependence of the penetration depth. The penetration depth can be determined to be λ(0) > 3.8 nm as \(\lambda (0)={\varphi }_{0}/[2\sqrt{2}{\rm{\pi }}{H}_{{\rm{c}}}(0)\xi (0)]\,\) with Hc(0) = 61.8 T and ξ(0) = 2.3 nm; ϕ0 is the magnetic flux quantum. c, GL parameter, κ = λ(T)/ξ(T) at \(T=0\); \(\kappa > 1/\sqrt{2}\) indicates type II superconductivity. In our experiment κ > 1.1, so the sample can be identified as a type II superconductor. d, Variation of the superconducting bandgap Δ versus temperature, \(\varDelta (T)/\varDelta (0)=1.76{k}_{{\rm{B}}}\,{T}_{{\rm{c}}}\sqrt{1-(T/{T}_{{\rm{c}}})}\) (kB, Boltzmann constant).

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