Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session

TT 33.10: Poster

Mittwoch, 28. März 2012, 15:00–19:00, Poster B

Systematic NMR/NQR investigation of the local charge environment in iron pnictides — •Uwe Gräfe¹, Eva-Maria Brüning¹, Guillaume Lang¹, Louis Veyrat¹, Seung-Ho Baek¹, Hans-Joachim Grafe¹, Dalibor Paar^1,2, Franziska Hammerath¹, Katarina Manthey¹, Günther Behr¹, Jochen Werner¹, Sabine Wurmehl¹, and Bernd Büchner¹ — ¹IFW Dresden, Institute for Solid State Research, P.O. Box 270116, D-01171 Dresden, Germany — ²Dept. of Physics, Faculty of Science, Univ. of Zagreb, P.O. Box 331, HR-10002 Zagreb, Croatia

As iron-based superconductors are a striking example of a system featuring unconventional superconductivity close to a region of static magnetism in the phase diagram, much attention has been devoted to the study of ground-state coexistence and/or competition. In this regard, a more general question is the existence and the role played by electronic inhomogeneities, whether in ordered states or in the paramagnetic state. A powerful tool to investigate these issues is Nuclear Magnetic/Quadrupole Resonance, which allows to probe locally the electric charge environment and the spin fluctuations. Here, we present a summary of recents results and on-going studies at the As site of 1111 iron pnictides.