Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron-Pnictide Superconductor BaFe${}_{1.8}$Co${}_{0.2}$As${}_2$

Yi Yin, M. Zech, T. L. Williams +4

We present an atomic resolution scanning tunneling spectroscopy study of superconducting BaFe${}_{1.8}$Co${}_{0.2}$As${}_2$ single crystals in magnetic fields up to $9\text{Tesla}$. At…