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

Kuzmicheva, T. E.; Kuzmichev, S. A.; Zhigadlo, N. D. (2019). Superconducting order parameter and bosonic mode in hydrogen-substituted NdFeAsO0.6H0.36 revealed by multiple-Andreev-reflection spectroscopy. Physical review. B - condensed matter and materials physics, 100(14), pp. 1-10. American Physical Society 10.1103/PhysRevB.100.144504

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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).

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Zhigadlo, Nikolai

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

1098-0121

Publisher:

American Physical Society

Language:

English

Submitter:

Franziska Bornhauser-Rufer

Date Deposited:

27 Feb 2020 10:26

Last Modified:

27 Feb 2020 10:26

Publisher DOI:

10.1103/PhysRevB.100.144504

BORIS DOI:

10.7892/boris.140678

URI:

https://boris.unibe.ch/id/eprint/140678

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