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Multiple Andreev Reflection Effect Spectroscopy of Underdoped NaFe(1–x)Co(x)As Single Crystalsстатья
- Авторы: Kuzmichev S.A., Morozov I.V., Shilov A.I., Rakhmanov E.O., Kuzmicheva T.E.
- Журнал: JETP Letters
- Том: 117
- Номер: 8
- Год издания: 2023
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 612
- Последняя страница: 617
- DOI: 10.1134/s0021364023600751
- Аннотация: We study the structure of the superconducting order parameter in underdoped NaFe(1-x)Co(x)As 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 Δ_S(0), and possible edges of the large gap Δ_L(0) having an anisotropy in the ab plane at T << Tc, the corresponding characteristic ratios, as well as their temperature dependences. Additionally, we detect features of the tunneling dI(V)/dV spectra in NaFe(1-x)Co(x)As at eV* > 2Δ_L(0), those irrelative to superconducting state, and discuss their origin.
- Добавил в систему: Кузьмичев Светослав Александрович