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TT: Fachverband Tiefe Temperaturen

TT 21: Superconductivity: Poster Session

TT 21.22: Poster

Montag, 16. März 2015, 15:00–18:00, Poster B

High energy spectra on Fe-based unconventional superconductors — •Pranab Kumar Nag¹, Danny Baumann¹, Ronny Schlegel¹, Robert Beck¹, Sabine Wurmehl^1,2, Thomas Wolf³, Bernd Büchner^1,2, and Christian Hess¹ — ¹Leibniz-Institute for Solid State and Materials Research, IFW-Dresden, 01171 Dresden, Germany — ²Institut für Festkörperphysik, TU Dresden, D-01062 Dresden, Germany — ³Karlsruher Institut für Technologie, Institut für Festkörperphysik, Postfach 3640, D-76021 Karlsruhe

We have performed low-temperature scanning tunneling microscopy and spectroscopy on LiFeAs, Co doped NaFeAs and FeSe superconductors. The spectroscopy data routinely reveal important aspects of the electronic structure both very close to the Fermi level, i.e. the superconducting gap, and distinct features at higher energies. The latter appear in occupied states roughly between -0.3 eV and -0.5 eV in these materials, and allow specific comparison with ARPES band structure data.