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Multiband Superconductivity in KCa2Fe4As4F2статья Исследовательская статья
Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
- Авторы: Sadakov A.V., Gippius A.A., Daniyarkhodzhaev A.T., Muratov A.V., Kliushnik A.V., Sobolevskiy O.A., Vlasenko V.A., Shilov A.I., Pervakov K.S.
- Журнал: JETP Letters
- Том: 119
- Номер: 2
- Год издания: 2024
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 111
- Последняя страница: 117
- DOI: 10.1134/s0021364023603676
- Аннотация: The paper reports complementary studies of the order parameter of the newly discovered iron-based superconductor, KCa2Fe4As4F2 (Tc = 34 K), that consists of alternating blocks of KFe2As2 (122) phase and CaFeAsF (1111) phase. We performed high-resolution intrinsic multiple Andreev reflection spectroscopy supplemented with self-field critical current measurements. Andreev spectra obtained by means of a break-junction technique reveal two distinct superconducting order parameters ΔL and ΔS. Their temperature dependencies were measured from 1.5 K to Tc. The shapes of Andreev reflections dips, corresponding to the two gaps are symmetrical, which is a signature of s-wave order parameter. Temperature dependence of the self-field critical current can also be described by two s-wave gaps model.
- Добавил в систему: Гиппиус Алексей Андреевич