Berlin 2015 – wissenschaftliches Programm
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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 Wurmehl1,2, Thomas Wolf3, Bernd Büchner1,2, 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.