Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 72: Correlated Electrons: Frustrated Magnets - General 2

TT 72.11: Vortrag

Donnerstag, 23. März 2017, 17:45–18:00, HSZ 204

Strong coupling on structure and magnetism in SrCo₂P₂ — •Inga Kraft^1,2, Kathrin Götze^3,2, Johannes Klotz³, Vivien Lorenz⁴, Christoph Bergmann¹, Yurii Prots¹, Jan Bruin⁵, Alix McCollam⁵, Ilya Sheikin⁶, Jochen Wosnitza², Christoph Geibel¹, and Helge Rosner¹ — ¹MPI CPfS, Dresden — ²Technical University of Dresden — ³HLD-EMFL, Dresden — ⁴Institut für Festkörper- und Werkstoffforschung (IFW), Dresden — ⁵HFML-EMFL, Nijmegen, The Netherlands — ⁶CNRS Grenoble, France

Though the iron pnictide 122 systems show a comparatively simple structure, they attracted large interest owing to their rich physics. SrCo₂P₂ is closely related to the iron-pnictide superconductors, but does not show superconductivity or magnetic order down to 300 mK. In contrast, previous DFT band structure calculations found a large DOS at E_F and predicted a magnetic (or other) instability. Based on new low temperature XRD structural data, we calculate the respective electronic structure and compare it to the angle-dependent dHvA measurements. Our results yield a strongly reduced DOS(E_F) and explain the observed strong magnetic fluctuations and absence of magnetic order.