Strain effects on electronic structure of the iron selenide superconductor

Abstract

The influence of various strains on crystal and electronic structures of superconducting FeSe has been studied ab initio. We consider changes in the Fermi surface nesting with a vector Q=(0.5,0.5)*(2π/a) as crucial for rising superconductivity (SC) mediated by spin-fluctuations (SF). Our results indicate that the c-axis strained FeSe exhibits the most imperfect nesting, which enhances SF and, hence, also SC. In turn, the ab-plane compressive strain slightly weakens this} nesting while the tensile strain destroys it completely. These findings are consistent with reported earlier experimental dependencies of superconducting transition temperatures on strain in FeSe thin films.

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Cited by in corpus (11)

• van der Waals interaction in iron-chalcogenide superconductors
• The substitution effects on electronic structure of iron selenide superconductors
• A first-principles study of the electronic structure of Iron-Selenium; Implications for electron-phonon superconductivity
• Strain effects on the electronic structure of the FeSe0.5Te0.5 superconductor
• Strain effects in monolayer Iron-Chalcogenide 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${}_2$
• Electronic properties of the FeSe/STO interface from first-principle calculations
• Magnetism and Superconductivity of S-substituted FeTe
• Resistivity in Co-doped Ba-122: comparison of thin films and single crystals
• Electronic structure of ruthenium-doped iron chalcogenides