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.

References in corpus (12)

• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Extreme Sensitivity of Superconductivity to Stoichiometry in FeSe (Fe1+dSe)
• Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide
• First-order magnetic and structural phase transitions in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$
• Funtional Renormalization Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs Based High Temperature Superconductors
• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• Substitution Effects on FeSe Superconductor
• The BCS-like gap in superconductor SmFeAsO_0.85F_0.15
• Multiband magnetism and superconductivity in Fe-based compounds
• Preparation and superconductivity of iron selenide thin films

Cited by in corpus (5)

• Unabridged phase diagram for single-phased FeSexTe1-x thin films
• FeTe${}_{0.55}$Se${}_{0.45}$: a multiband superconductor in the clean and dirty limit
• Influence of substrate type on transport properties of superconducting 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