Distinct Modulation Behavior of Superconducting Coherence Peaks Associated with Sign-Reversal Gaps in FeTe${}_{0.55}$Se${}_{0.45}$

Zhiyong Hou, Zhiyuan Shang, Wen Duan +3

Using high-resolution scanning tunneling microscopy, we reveal two distinct types of superconducting (SC) gap modulations in bulk superconductor FeTe${}_{0.55}$Se${}_{0.45}$. By analyz…