Iron Displacements in the Antiferromagnetic Spin-Ladder Compound BaFe2Se3

Details Iron Displacements in the Antiferromagnetic Spin-Ladder Compound BaFe2Se3 Iron Displacements in the Antiferromagnetic Spin-Ladder Compound BaFe2Se3

2011-08-15

arxiv.org/abs/1108.2928v1

Phys. Rev. B (Rapid) 84, 180409 (2011)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.84.180409

In this letter we present a systematic study of the spin-ladder compound BaFe$_2$Se$_3$. Short-range magnetic correlations, present at room temperature, develop into long-range antiferromagnetic order below T$_N$ = 256 K, with no superconductivity down to 1.8 K. Built of ferromagnetic Fe$_4$ plaquettes, the magnetic ground state correlates with subtle displacements of the Fe atoms. These results provide insight into the interplay between atomic displacements and magnetic correlations in related iron-based compounds, and their possible role in the emergence of superconductivity.

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