Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 8: Superconductivity: Fe-based Superconductors - 122 Part 1

TT 8.4: Talk

Monday, March 26, 2012, 15:45–16:00, H 2053

Scanning tunneling spectroscopy in Co-doped BaFe₂As₂: What density functional theory can tell us. — •Klaus Koepernik¹, Steven Johnston¹, Jeroen van den Brink¹, Erik van Heumen², and Mark S. Golden² — ¹IFW Dresden, Germany — ²van der Waals-Zeeman institute, University of Amsterdam, the Netherlands

We us density functional theory to simulate the scanning tunneling spectra and topographic images of Co-doped BaFe₂As₂. The matrix element effects are evaluated and the specific contributions of the different surface atoms to the spectra are considered. The results give a better understanding of the measured spectra and assess the resolution of STS measurements in these systems.