Scanning Tunneling Microscopy/Spectroscopy study on Optimally Potassium Doped Single Crystal BaFe$_{2}$As$_{2}$

ORAL

Abstract

The iron pnictide parent compound material can be brought into superconducting state by chemical doping. It is worthwhile to study and compare the hole- and electron-doped iron pnictides. Among the well-known family of AEFe$_{2}$As$_{2}$ (AE=Ca, Sr, Ba), the scanning tunneling microscopy/spectroscopy study on hole-doped samples is insufficient. In this talk we will present high resolution STM/STS results on (001) surface of the optimally doped single crystal Ba$_{0.6}$K$_{0.4}$Fe$_{2}$As$_{2}$ (Tc$\sim $37K). With the data we will discuss the spatial variation of the superconducting energy gap.

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Authors

  • Jihua Ma

    • Department of Physics and Texas Center for Superconductivity, University of Houston/Department of Physics, Boston College

  • Ang Li

    • Department of Physics and Texas Center for Superconductivity, University of Houston

  • Chenglin Zhang

    • Department of Physics and Astronomy, University of Tennessee

  • Pengcheng Dai

    • Department of Physics and Astronomy, University of Tennessee

  • Shuheng Pan

    • Department of Physics and Texas Center for Superconductivity, University of Houston