Details

Autor(en) / Beteiligte

• Kuzmicheva, T E
• Kuzmichev, S A
• Zhigadlo, N D

Titel

Superconducting order parameter and bosonic mode in hydrogen-substituted NdFeAsO0.6H0.36 revealed by multiple-Andreev-reflection spectroscopy

Ist Teil von

• Physical review. B, 2019-10, Vol.100 (14)

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2019

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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).