Superconducting gap symmetry in BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$ superconductor

T. E. Kuzmicheva, S. A. Kuzmichev, A. V. Sadakov +8

We report on the Andreev spectroscopy and specific heat of high-quality single crystals BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$. The intrinsic multiple Andreev reflection spectroscopy revea…