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The influence of tensile strain in the ab-plane on crystal and electronicstructure of FeTe has been studied ab initio. In superconducting FeSe the Fermisurface nesting with a vector q~(0.5,0.5)(2\pi /a) is believed to be crucialfor rising superconductivity mediated by spin-fluctuations. The resultspresented here indicate that tensile-strained FeTe also exhibits suchconditions. Furthermore, the Fermi surface changes, related to the increase ofthe lattice parameter a of this telluride, are opposite to analogous effectsreported for FeSe. Since a recently reported transition from the double-stripeto the single-stripe magnetic order in FeTe under tensile strain in theab-plane is associated with an occurence of superconductivity in correspondingthin films, these findings allow for drawing a consistent picture ofsuperconductivity in FeSe(1-x)Te(x) systems, in general.

Strain effects on electronic structure and superconductivity in the iron telluride