Strain effects on the electronic structure of the FeSe0.5Te0.5 superconductor

Abstract

The electronic structure of the strained FeSe0.5Te0.5 superconductor has been investigated from first principles. Our calculation results indicate that the influence of hydrostatic, biaxial or uniaxial compressive stress on the density of states at the Fermi level is insignificant. The overall shape of the Fermi-surface (FS) nesting function for FeSe0.5Te0.5 at ambient pressure resembles that of its parent compound, FeSe, but under the ab-plane compressive strain. In these two systems, changes of their FSs under various stress conditions are qualitatively almost the same. However, in FeSe0.5Te0.5 the intensity of the perfect Q=(0.5,0.5)*(2π/a) nesting vector is more diminished. These findings are in good agreement with former experimental data and support the idea of spin-fluctuation mediated superconductivity in iron chalcogenides.

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Cited by in corpus (5)

• The substitution effects on electronic structure of iron selenide superconductors
• Magnetic phase transitions and superconductivity in strained FeTe
• Structural, electronic, and dynamical properties of the tetragonal and collapsed tetragonal phases of KFe${}_2$As${}_2$
• Magnetism and Superconductivity of S-substituted FeTe
• Electronic structure of ruthenium-doped iron chalcogenides