Muon-spin rotation measurements of the magnetic penetration depth in the iron-based superconductor Ba1−xRbxFe2As2
Z. Guguchia, Z. Shermadini, A. Amato, A. Maisuradze, A. Shengelaya, Z. Bukowski, H. Luetkens, R. Khasanov, J. Karpinski, H. Keller
DOI 10.1103/PhysRevB.84.094513 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Measurements of the magnetic penetration depth λ in the Fe-based superconductor Ba1−xRbxFe2As2 (x=0.3, 0.35, 0.4) were carried out using the muon-spin rotation (μSR) technique. The temperature dependence of λ is well described by a two-gap s+s-wave scenario with a small gap Δ1≈1–3 meV and a large gap Δ2≈7–9 meV. By combining the present data with those previously obtained for RbFe2As2 a decrease of the BCS ratio 2Δ2/kBTc with increasing Rb content x is observed. On the other hand, the BCS ratio 2Δ1/kBTc is almost independent of x. In addition, the contribution of Δ1 to the superfluid density is found to increase with x. These results are discussed in light of the suppression of interband processes upon hole doping.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba0.7Rb0.3Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36.9 | Pressure not reported | unknown |
| Ba0.65Rb0.35Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35.8 | Pressure not reported | unknown |
| Ba0.6Rb0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34 | Pressure not reported | unknown |
| RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.52 | Pressure not reported | unknown |
Similar papers
Microscopic study of the superconducting state of the iron pnictide RbFe2As2 via muon spin rotation
similarity 0.94Z. Shermadini et al.
Source status unknown — claims are unverified
Muon spin rotation measurement of the magnetic field penetration depth in Ba(Fe0.926Co0.074)2As2: Evidence for multiple superconducting gaps
similarity 0.94T. J. Williams et al.
Source status unknown — claims are unverified
Spin excitation anisotropy in the optimally isovalent-doped superconductor BaFe2(As0.7P0.3)2
similarity 0.94Ding Hu et al.
Source status unknown — claims are unverified
Doping evolution of the anisotropic upper critical fields in the iron-based superconductor Ba1−xKxFe2As2
similarity 0.94M. A. Tanatar et al.
Source status unknown — claims are unverified
Superfluid density and superconducting gaps of RbFe2As2 as a function of hydrostatic pressure
similarity 0.94Z. Shermadini et al.
Source status unknown — claims are unverified
Probing the pairing symmetry in the over-doped Fe-based superconductor Ba0.35Rb0.65Fe2As2 as a function of hydrostatic pressure
similarity 0.94Z. Guguchia et al.
Source status unknown — claims are unverified