Superconducting order parameter and bosonic mode in hydrogen-substituted NdFeAsO0.6H0.36 revealed by multiple-Andreev-reflection spectroscopy
T. E. Kuzmicheva, S. A. Kuzmichev, N. D. Zhigadlo
DOI 10.1103/PhysRevB.100.144504 · 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
Using intrinsic multiple-Andreev-reflection-effect spectroscopy, we studied ballistic superconductor-normal metal-superconductor (SnS) contacts in layered oxypnictide superconductors NdFeAsO0.6H0.36 with critical temperatures Tc=45−48 K. We directly determined the magnitude of two bulk superconducting order parameters, the large gap ΔL≈10.4 meV, a possible small gap ΔS≈1.8 meV, and their temperature dependence. Additionally, a resonant coupling with a characteristic bosonic mode was observed—the boson energy at 4.2 K, ɛ0=10.5−11.0 meV being less than the indirect gap (ΔL<ɛ0<ΔL+ΔS).
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NdFeAsO0.6H0.36 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 48 | Pressure not reported | onset |
| NdFeAsO0.6H0.36 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 45 | Pressure not reported | unknown |
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| SmFe0.92Co0.08AsO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | unknown |
| NdFeAsO0.6F0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
Similar papers
Quantum phase transition under pressure in the heavily hydrogen-doped iron-based superconductor LaFeAsO
similarity 0.95Naoki Fujiwara et al.
Source status unknown — claims are unverified
Extraordinary Doping Effects on Quasiparticle Scattering and Bandwidth in Iron-Based Superconductors
similarity 0.94Z. R. Ye et al.
Source status unknown — claims are unverified
Superconducting and tetragonal-to-orthorhombic transitions in single crystals of FeSe1−xTex (0≤ x ≤0.61)
similarity 0.94Kotaro Terao et al.
Source status unknown — claims are unverified
Statistics of the subgap states of s± superconductors
similarity 0.94A. Glatz & A. E. Koshelev
Source status unknown — claims are unverified
Density-functional calculations of the electronic structures and magnetism of the pnictide superconductors BaFeAs2 and BaFeSb2
similarity 0.93J. H. Shim et al.
Source status unknown — claims are unverified
First-principles-based s±-wave modeling for iron-based superconductors: Specific heat and nuclear magnetic relaxation rate
similarity 0.93N. Nakai et al.
Source status unknown — claims are unverified