Lattice and magnetic instabilities in CaFe$_{2}$As$_{2}$

By S. Nandi, A. Goldman, D. Argyriou, B. Ouladdiaf, T. Chatterji, A. Kreyssig, N. Ni, S. Bud’ko, Paul C. Canfield, R. McQueeney. 2008

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In-plane electronic anisotropy of underdoped ‘122’ Fe-arsenide superconductors revealed by measurements of detwinned single crystals (2011, background): “Furthermore, diffraction measurements reveal that for unstressed conditions the material is fundamentally tetragonal within the available resolution (Goldman et al 2008, Huang et al 2008, Zhao et al 2008, Kim et al 2011).”
Iron-based high transition temperature superconductors (2014, unknown): “13c [58,115,181–190].”
Superconductivity in iron compounds (2011, background): “…the following cases: M ¼ Ba, TS ¼ 142 K (see early work by Huang et al., 2008 and recent data on an annealed single crystal by Rotundu et al., 2010); M ¼ Sr, TS ¼ 205, (Krellner et al. (2008); Zhao et al. (2008a); M ¼ Ca, TS ¼ 171 K (Ronning et al., 2008; Goldman et al., 2008; Kumar et al., 2009a).”
Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides. (2011, methodology): “(a)the DFT+DMFT calculated and experimental[6–13] Fe magnetic moments in the SDW and DSDW states.”