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Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 53: Superconductivity: Fe-based Superconductors - 122

TT 53.4: Talk

Wednesday, April 2, 2014, 10:15–10:30, HSZ 201

Coupled order parameters in Ca1−xNaxFe2As2 — •Philipp Materne1, Sirko Bubel1, Hemke Maeter1, Rajib Sarkar1, Johannes Spehling1, Luminita Harnagea2, Sabine Wurmehl2,1, Bernd Buechner2,1, Hubertus Luetkens3, and Hans-Henning Klauss11Institut für Festkörperphysik, Technische Universität Dresden, 01062 Dresden, Germany — 2IFW Dresden, Postfach 270016, 01171 Dresden, Germany — 3Paul-Scherrer-Institut, 5232 Villigen, Switzerland

The antiferromagnetic parent compound, CaFe2As2, shows a supression of the spin density wave and a subsequent superconducting state upon partial substitution of Ca by Na. Along the substitution series, superconducting transition temperatures up to ≈35 K were found. We studied the electronic phase diagram of Ca1−xNaxFe2As2 using Mössbauer spectroscopy and muon spin relaxation experiments in terms of order parameter interaction in the coexistence region as well as electronic properties in the pure magnetic and superconducting parts of the phase diagram. The results were compared with recently published data of Ba1−xNaxFe2As2 [1].

[1]H. Maeter et al., arXiv:1210.6881
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