Control of tetrahedral coordination and superconductivity in FeSe0.5Te0.5 thin films

Abstract

We demonstrate a close relationship between superconductivity and the dimensions of the Fe-Se(Te) tetrahedron in FeSe0.5Te0.5. This is done by exploiting thin film epitaxy, which provides controlled biaxial stress, both compressive and tensile, to distort the tetrahedron. The Se/Te height within the tetrahedron is found to be of crucial importance to superconductivity, in agreement with the theoretical proposal that (pi,pi) spin fluctuations promote superconductivity in Fe superconductors.

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Cited by in corpus (21)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity in Iron Compounds
• Suppression of Superconductivity by Twin Boundaries in FeSe
• Strain induced superconductivity in the parent compound BaFe2As2
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Unabridged phase diagram for single-phased FeSexTe1-x thin films
• Generic Fe buffer layers for Fe-based superconductors: Epitaxial FeSe1-xTex thin films
• FeTe${}_{0.55}$Se${}_{0.45}$: a multiband superconductor in the clean and dirty limit
• Interface control by homoepitaxial growth in pulsed laser deposited iron chalcogenide thin ilms
• Population inversion and dynamical phase transitions in a driven superconductor
• Influence of substrate type on transport properties of superconducting FeSe0.5Te0.5 thin films
• Magnetic scattering and electron pair breaking by rare-earth-ion substitution in BaFe2As2 epitaxial films
• Strain effects on the electronic structure of the FeSe0.5Te0.5 superconductor
• Chemical composition control at the substrate interface as the key for FeSe thin film growth
• Magnetic phase transitions and superconductivity in strained FeTe
• Pressure effects on strained FeSe0.5Te0.5 thin films
• Magnetic surface reconstruction in the van-der-Waals antiferromagnet Fe${}_{1+x}$Te
• Electronic structure of ruthenium-doped iron chalcogenides
• Emergence of spatial patterns and synchronization in superconducting time crystals
• The tunneling spectra and superconducting gaps observed by using scanning tunneling microscope near the grain-boundary of FeSe0.3Te0.7 films
• Piezostrain-induced in-plane anisotropy of superconducting transition temperature for FeSe0.5Te0.5 thin films