Suppression of Andreev conductance in a topological insulator

Suppression of Andreev conductance in a topological insulator–superconductor nanostep junction

Zheng Yi-Jie, Song Jun-Tao, Li Yu-Xian^†,

(a) The Andreev conductance in N₁N₂S junction as a function of incident energy ɛ with different junction height L. (b) The normal conductance in normal step junction N₁N₂N₁ as a function of incident energy ɛ with different junction height L.