Andreev reflection spectroscopy on Bi${}_2$X${}_3$ (X = Se, Te) topological insulators: Implications for the c-axis superconducting proximity effect

C. R. Granstrom, I. Fridman, H. -C. Lei +2

Using Andreev reflection (AR) as an experimental gauge of the superconducting proximity effect (PE), we assess the topological purity of the superconductivity that is induced by th…