%0 Generic
%T Superconductivity behavior in epitaxial TiN films points at surface magnetic disorder
%A Saveskul, N. A.
%A Titova, N. A.
%A Baeva, E. M.
%A Semenov, A. V.
%A Lubenchenko, A. V.
%A Saha, S.
%A Reddy, H.
%A Bogdanov, S. I.
%A Marinero, E. E.
%A Shalaev, V. M.
%A Boltasseva, A.
%A Khrapai, V. S.
%A Kardakova, A. I.
%A Goltsman, G. N.
%D 2019
%F Saveskul_etal2019
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1278), last updated on Sat, 08 May 2021 15:19:32 -0500
%X We analyze the evolution of the normal and superconducting electronic properties in epitaxial TiN films, characterized by high Ioffe-Regel parameter values, as a function of the film thickness. As the film thickness decreases, we observe an increase of in the residual resistivity, which becomes dominated by diffusive surface scattering for d≤20nm. At the same time, a substantial thickness-dependent reduction of the superconducting critical temperature is observed compared to the bulk TiN value. In such a high quality material films, this effect can be explained by a weak magnetic disorder residing in the surface layer with a characteristic magnetic defect density of ∼1012cm−2. Our results suggest that surface magnetic disorder is generally present in oxidized TiN films.
%9 miscellaneous
%U https://arxiv.org/abs/1903.05009v3