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We investigate the electronic and other properties of the hypotheticalcompound LiFeSb in relation to superconducting LiFeAs and FeSe using densityfunctional calculations. The results show that LiFeSb in the LiFeAs structurewould be dynamically stable in the sense of having no unstable phonon modes,and would have very similar electronic and magnetic properties to the layeredFe based superconductors. Importantly, a very similar structure for the Fermisurface and a spin density wave related to but stronger than that in thecorresponding As compound is found. These results are indicative of possiblesuperconductivity analogous to the Fe-As based compounds if the spin densitywave can be suppressed by doping or other means. Prospects for synthesizingthis material in pure form or in solid solution with FeTe are discussed.

Possible Superconductivity in Fe-Sb Based Materials: Density Functional Study of LiFeSb