CaFe2As2: a Springboard to Investigating Fe-Pnictide Superconductivity

Autor:	Tompsett, D. A., Lonzarich, G. G.
Rok vydání:	2009
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
Popis:	We present detailed electronic structure calculations for CaFe2As2. We investigate in particular the `collapsed' tetragonal and orthorhombic regions of the temperature-pressure phase diagram and find properties that distinguish CaFe2As2 from other Fe-pnictide compounds. In contrast to the tetragonal phase of other Fe-pnictides the electronic structure in the `collapsed' tetragonal phase of CaFe2As2 is found to be strongly 3D. We discuss the influence of these properties on the formation of superconductivity and in particular we find evidence that both magnetic and lattice interactions may be important to the formation of superconductivity. We also find that the Local Spin Density Approximation is able to accurately predict the ordering moment in the low temperature orthorhombic phase. Comment: 5 Pages, 4 Figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0902.4859 Zobrazit plný text záznamu View this record from Arxiv