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Intrinsic Multiple Andreev Reflections in Layered Th-Doped Sm(1-x)Th(x)OFeAsстатья
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 марта 2016 г.
- Авторы: Kuzmicheva T.E., Kuzmichev S.A., Tchesnokov S.N., Zhigadlo N.D.
- Журнал: Journal of Superconductivity and Novel Magnetism
- Том: 29
- Год издания: 2016
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 673
- Последняя страница: 677
- DOI: 10.1007/s10948-015-3297-x
- Аннотация: Layered oxypnictide Sm(1−x)Th(x)OFeAs (Sm-1111) is an ideal candidate to be probed by intrinsic multiple Andreev reflections effect (IMARE) spectroscopy. Using the classical “break-junction” technique, we formed ballistic Andreev arrays of identical S–n–S-contacts, where S is superconductor, and n is thin layer of normal metal. For T < Tc, the I(V) curve shows an excess-current and a subharmonic gap structure (SGS): a set of sharp dI(V)/dV-dips at positions which depend on the superconducting gap value, the number of junctions in the array, and the natural subharmonic order, thus manifesting the effect of intrinsic multiple Andreev reflections. Here, we present the I(V) and dI(V)/dV with up to 4 SGS dips for Andreev arrays formed in optimally doped Sm-1111 with critical temperatures Tc ~= 49 K, as well as in underdoped samples with Tc ~= 37 K. We show that a number of Andreev subharmonics facilitates the determination of the superconducting gap with a better accuracy.
- Добавил в систему: Кузьмичев Светослав Александрович