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TT: Fachverband Tiefe Temperaturen

TT 12: Poster Session Superconductivity

TT 12.33: Poster

Montag, 11. März 2013, 15:00–19:00, Poster D

Investigation on KFe₂As₂ single crystals by means of X-ray spectroscopy — •Anna Buling¹, Nikolay Skorikov², Aswartham Saicharan³, Sabine Wurmehl³, Bernd Büchner³, and Manfred Neumann¹ — ¹Department of Physics, University of Osnabrueck, Barbarastr. 7, D-49069 Osnabrueck, Germany — ²Institute of Metal Physics, Russian Academy of Sciences-Ural Division, 620219 Yekaterinburg, Russia — ³IFW Dresden, PF 270116, D-01171 Dresden, Germany

Soon after superconductivity was found in fluorine doped LaOFeAs, the new AFe₂As₂ familiy of pnictide superconductors without the LaO spacer layers was discovered.
KFe₂As₂ is an endpoint in the Ba_1−xK_xFe₂As₂ system and takes a special role among the other 122 and 1111 Fe pnictides due to its low T_c around 3.7 K, the lack of the typical orthorhombic structural transition and some other diverse properties. We report on a detailed investigation of the electronic structure of KFe₂As₂ (K122) single crystals by means of X-ray spectroscopy completed by density functional theory (DFT) calculations. These results will be compared with further already investigated Ba122 compounds.