Heat transport in RbFe2As2 single crystals: Evidence for nodal superconducting gap
Z. Zhang, A. F. Wang, X. C. Hong, J. Zhang, B. Y. Pan, J. Pan, Y. Xu, X. G. Luo, X. H. Chen, S. Y. Li
DOI 10.1103/PhysRevB.91.024502 · Physical Review B
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Abstract
The in-plane thermal conductivity of iron-based superconductor RbFe2As2 single crystal (Tc≈ 2.1 K) was measured down to 100 mK. In zero field, the observation of a significant residual linear term κ0/T = 0.65 mW K−2 cm−1 provides clear evidence for nodal superdonducting gap. The field dependence of κ0/T is similar to that of its sister compound CsFe2As2 with comparable residual resistivity ρ0 and lies between the dirty and clean KFe2As2. These results suggest that the (K, Rb, Cs)Fe2As2 serial superconductors have a common nodal gap structure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | onset |
| RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | onset |
| RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.13 | Pressure not reported | zero_resistance |
| RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure not reported | onset |
| CsFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.8 | Pressure not reported | unknown |
| CsFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.2 | Pressure not reported | onset |
| KFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure not reported | unknown |
| KFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure not reported | unknown |
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