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- Title
Multiple Andreev Reflection Effect Spectroscopy of Underdoped NaFe<sub>1 –</sub><sub>x</sub>Co<sub>x</sub>As Single Crystals.
- Authors
Kuzmichev, S. A.; Morozov, I. V.; Shilov, A. I.; Rakhmanov, E. O.; Kuzmicheva, T. E.
- Abstract
We study the structure of the superconducting order parameter in underdoped NaFe1 –xCoxAs pnictides with Tc ≈ 19–21 K related to the 111 family. Using incoherent multiple Andreev reflection effect spectroscopy of planar break junctions, we directly determine the magnitudes of the two microscopic superconducting order parameters: the small superconducting gap ΔS(0), and possible edges of the large gap ΔL(0) having an anisotropy in the plane at T ≪ Tc, the corresponding characteristic ratios, as well as their temperature dependences. Additionally, we detect features of the tunneling spectra in NaFe1 –xCoxAs at , those irrelative to superconducting state, and discuss their origin.
- Subjects
ANDREEV reflection; REFLECTANCE spectroscopy; SINGLE crystals; ANISOTROPY; TUNNEL design &; construction
- Publication
JETP Letters, 2023, Vol 117, Issue 8, p612
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364023600751