Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 81: Superconductivity: Properties and Electronic Structure

TT 81.5: Vortrag

Donnerstag, 3. April 2014, 10:30–10:45, HSZ 201

Following doped charges in cuprate superconductors by ¹⁷O and ⁶³Cu NMR — •Michael Jurkutat¹, Damian Rybicki¹, Grant Williams², Andreas Erb³, and Jürgen Haase¹ — ¹Universität Leipzig, Faculty of Physics and Earth Sciences, 04103 Leipzig, Germany — ²Victoria University, Wellington, New Zealand — ³Walther Meissner Institute for Low Temperature Research, 85748 Garching, Germany

We report results of a ¹⁷O and ⁶³Cu NMR investigation of aligned powder as well as single crystal samples of electron-doped cuprates RE_2−xCe_xCuO₄(with RE=Pr,Nd and x=0.0,..,0.2), a hitherto hardly investigated field of high-T_C research. Employing a range of NMR techniques we show that doped electrons almost exclusively go to planar Cu, while leaving a considerable hole density at planar O largely unchanged. Our results are then compared with findings in hole-doped cuprates shedding new light on the local charge distribution within the CuO₂-plane.