Controlling Factors of Tc-Dome Structure in 1111-Type Iron Arsenide Superconductors

Abstract

We investigated the effects of phosphorus substitution on the shape of the Tc(x) dome in 1111-type SmFeAs1-yPyO1-xHx (0 < x < 0.5). Hydride ion substitution of oxide sites (O2- -> H-) exerts a chemical pressure effect, i.e., a structural reduction of the Pn-Fe-Pn angle α (Pn = P, As) and also dopes electrons into the FePn layer to induce superconductivity. Isovalent phosphorus substitution (P3- -> As3-) can induce only a chemical pressure effect, i.e., an increase of α for La-substitution of Sm-sites. As y increases from 0.0 to 0.5, the single Tc dome gradually splits into two domes, similar to those of LaFeAsO1-xHx with a Tc valley at x ~ 0.16. We found that the Tc valley is located around (x, α) ~ (0.16, 113°) for both SmFeAs1-yPyO1-xHx and LaFeAsO1-xHx series, irrespective of changes in the Pn anion and Ln cation species. This result suggests that suppression of Tc leads to the emergence of a Tc valley when both the shape of FePn4 tetrahedra represented by α and electron doping level of x meet the above criterion in 1111 type iron oxypnictide superconductors.

References in corpus (12)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln=La,Nd)
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Crystallographic Phase Transition and High-Tc Superconductivity in LaFeAsO:F
• Bipartite magnetic parent phases in the iron-oxypnictide superconductor
• Hydrogen in layered iron arsenide: indirect electron doping to induce superconductivity
• Orbital Fluctuation Theory in Iron Pnictides: Effects of As-Fe-As Bond Angle, Isotope Substitution, and $Z^2$-Orbital Pocket on the Superconductivity

Cited by in corpus (19)

• Recent advances in iron-based superconductors toward applications
• Iron-Based Superconductors: current status of materials and pairing mechanism
• Exploration of new superconductors and functional materials and fabrication of superconducting tapes and wires of iron pnictides
• High-Tc Superconductivity near the Anion Height Instability in Fe-based Superconductors: Analysis of LaFeAsO${}_{1-x}$H${}_x$
• Model of the Electronic Structure of Electron-Doped Iron-Based Superconductors: Evidence for Enhanced Spin Fluctuations by Diagonal Electron Hopping
• Superconductivity at 52 K in hydrogen-substituted LaFeAsO1-xHx under high pressure
• Two types of superconducting domes in unconventional superconductors
• Phonon dispersions and Fermi surfaces nesting explaining the variety of charge ordering in titanium-oxypnictides superconductors
• Heavily Hydride-ion-doped 1111-type Iron-based Superconductors: Synthesis, Physical Properties and Electronic Structure
• Peculiar Phase Diagram with Isolated Superconducting Regions in ThFeAsN${}_{1-x}$O${}_x$
• Possible Superconductivity in Electron-doped Chromium Pnictide LaOCrAs
• Hidden robust presence of a hole Fermi surface in a heavily electron doped iron based superconductor LaFe${}_2$As${}_2$
• Site-Selective Antimony Doping in Arsenic Zigzag Chains of 112-type Ca1-xLaxFeAs2
• Multiple-pseudogap phases in hydrogen-doped LaFeAsO system
• Theoretical study on the correlation between the spin fluctuation and $T_c$ in the isovalent-doped 1111 iron-based superconductors
• Quantum dynamics of hydrogen in iron-based superconductor LaFeAsO0.9D0.1 measured with inelastic neutron spectroscopy
• Orbital driven two-dome superconducting phases in multiorbital superconductors
• Observation of the bands with $d_{xy}$ orbital character near the Fermi level in NdFeAs${}_{1-x}$P${}_x$O${}_{0.9}$F${}_{0.1}$ using angle-resolved photoemission spectroscopy
• Fluorine-substitution-dependent phase diagram and superconducting properties of Sm-based oxypnictides synthesized by a high-pressure growth technique