Hydrogen in layered iron arsenide: indirect electron doping to induce superconductivity

Abstract

Utilizing the high stability of calcium and rare earth hydrides, CaFeAsF1-xHx (x = 0.0-1.0) and SmFeAsO1-xHx (x = 0.0-0.47) have been first synthesized using high pressure to form hydrogen-substituted 1111 type iron-arsenide superconductors. Neutron diffraction and density functional calculations have demonstrated that the hydrogens are incorporated as H- ions occupying F- sites in the blocking layer of CaFeAsF. The resulting CaFeAsF1-xHx is non-superconducting, whereas SmFeAsO1-xHx is a superconductor, with an optimal Tc = 55 K at x 0.2. It was found that up to 40% of the O2- ions can be replaced by H- ions, with electrons being supplied into the FeAs-layer to maintain neutrality (O2- = H-+ e-). When x exceeded 0.2, Tc was reduced corresponding to an electron over-doped region.

14 pages, 4 figures

References in corpus (26)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• The superconductivity at 18 K in LiFeAs system
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Superconductivity in Co-doped LaFeAsO
• Transition of stoichiometricSr2VO3FeAs to a superconducting state at 37.2 K
• Crystallographic Phase Transition and High-Tc Superconductivity in LaFeAsO:F
• Superconductivity at 17 K in (Fe2P2)(Sr4Sc2O6): a new superconducting layered pnictide oxide with a thick perovskite oxide layer
• Superconductivity induced by cobalt doping in iron-based oxyarsenides
• Effect of Co doping on superconductivity and transport properties in SmFe${}_{1-x}$Co${}_x$AsO
• Different resistivity response to spin density wave and superconductivity at 20 K in $C{a}_{1-x}N{a}_{x}F{e}_{2}A{s}_2$
• Superconductivity above 50K in LnFeAsO1-y (Ln= Nd, Sm, Gd, Tb and Dy) Synthesized by High-pressure Technique
• Narrow superconducting window in Ni-doped LaFeAsO
• Electronic and Magnetic Phase Diagram of a Superconductor, SmFeAsO1-xFx
• Effect of 3d Transition Metal Doping on the Superconductivity in Quaternary Fluoroarsenide CaFeAsF
• Possible high temperature superconductivity in Ti-doped A-Sc-Fe-As-O (A= Ca, Sr) system
• Absence of an appreciable iron isotope effect on the transition temperature of the optimally doped SmFeAsO_{1-y} superconductor
• Possible hydrogen doping and enhancement of Tc (= 35 K) in a LaFeAsO-based superconductor
• Coupling between 4f and itinerant electrons in SmFeAsO1-xFx (0.15 < x < 0.2) superconductors: an NMR study
• Strong carrier-scattering in iron-pnictide superconductors with highest Tc obtained from charge transport experiments
• WDX-Analysis of the New Superconductors RO(1-x)F(x)FeAs and Its Consequences on the Electronic Phase Diagram
• Mechanism of phase transitions and the electronic density of states in (La,Sm)FeAsO${}_{1-x}$F${}_x$ from ab initio calculations
• Superconductivity in Ti-doped Iron-Arsenide Compound Sr4Cr0.8Ti1.2O6Fe2As2

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• Recent advances in iron-based superconductors toward applications
• Exploration of new superconductors and functional materials and fabrication of superconducting tapes and wires of iron pnictides
• Two-dome structure in electron-doped iron arsenide superconductors
• Iron based high transition temperature superconductors
• Superconductivity from orbital nematic fluctuations
• Properties of Binary Transition-Metal Arsenides (TAs)
• The phase diagrams of iron-based superconductors: theory and experiments
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Identical effects of indirect and direct electron doping of superconducting BaFe2As2 thin films
• Bulk Synthesis of Iron-based Superconductors
• Superconductivity at 52 K in hydrogen-substituted LaFeAsO1-xHx under high pressure
• Superconductivity induced by hydrogen anion substitution in 1111-type iron arsenides
• A large moment antiferromagnetic order in overdoped high-Tc superconductor 154SmFeAsO1-xDx
• The effect of exceptionally high fluorine doping on the anisotropy of single crystalline SmFeAsO1-xFx
• Switching of intra-orbital spin excitations in electron-doped iron pnictide superconductors
• Superconductivity at 48 K of heavily hydrogen-doped SmFeAsO epitaxial films grown by topotactic chemical reaction using CaH2
• Controlling Factors of Tc-Dome Structure in 1111-Type Iron Arsenide Superconductors
• Investigation of hydrogen incorporations in bulk infinite-layer nickelates
• Superconductivity and Dirac Fermions in 112-phase Pnictides
• La-substituted CaFeAsH superconductor with Tc = 47 K
• Superconductivity in Uncollapsed Tetragonal LaFe2As2
• Heavy Electron doping-induced antiferromagnetic phase as the parent for iron-oxypnictide superconductor LaFeAsO1-xHx
• Novel Fe-based superconductor LaFe2As2 in comparison with traditional pnictides
• Enhancing the three-dimensional electronic structure in 1111-type iron arsenide superconductors by H-substitution
• Heavily Hydride-ion-doped 1111-type Iron-based Superconductors: Synthesis, Physical Properties and Electronic Structure
• Robust spin fluctuations and $s\pm$ pairing in the heavily electron doped iron-based superconductors
• Hydrogen-substituted superconductors SmFeAsO1-xHx misidentified as oxygen-deficient SmFeAsO1-x
• High pressure growth and electron transport properties of superconducting SmFeAsO1-xHx single crystals
• Superconducting Properties and Phase Diagram of Indirectly Electron-Doped (Sr1-xLax)Fe2As2 Epitaxial Films Grown by Pulsed Laser Deposition
• Revisiting the electron-doped SmFeAsO: enhanced superconductivity up to 58.6 K by Th and F codoping
• High upper critical field (120 T) with small anisotropy of highly hydrogen-substituted SmFeAsO epitaxial film
• Role of Hydrogen in the Electronic Properties of CaFeAsH-based Superconductors
• Pressure dependence of the low- temperature crystal structure and phase transition behaviour of CaFeAsF and SrFeAsF: A synchrotron x-ray diffraction study
• 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
• L4Fe2As2Te1-xO4-yFy (L = Pr, Sm, Gd): a layered oxypnictide superconductor with Tc up to 45 K
• Hydrogen in superconductors
• Multiple-pseudogap phases in hydrogen-doped LaFeAsO system
• Magnetism driven by strong electronic correlation in the heavily carrier-doped iron oxypnictide LaFeAsO${}_{0.49}$H${}_{0.51}$
• Negatively Charged Muonium and Related Centers in Solids
• High $J_{\mathrm{c}}$ and low anisotropy of hydrogen doped NdFeAsO superconducting thin film
• Crossover between magnetism and superconductivity in low H-doped LaFeAsO
• Evidence of the isoelectronic character of F doping in SmFeAsO(1-x)F(x): a first-principles investigation
• Inter- to Intra-Layer Resistivity Anisotropy of NdFeAs(O,H) with Various Hydrogen Concentrations
• Data analysis of $ab$ $initio$ effective Hamiltonians in iron-based superconductors $\unicode{x2014}$ Construction of predictors for superconducting critical temperature
• Metal-insulator transition and superconductivity in the two-orbital Hubbard-Holstein model for iron-based superconductors
• Optimization of a Non-arsenic Iron-based Superconductor for Wire Fabrication
• Phase transition in CaFeAsH: bridging 1111 and 122 iron-based superconductors
• Utilization of mechanical alloying method for flux growth of single crystalline BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Enhancement of the pinning potential in a single-crystal superconductor FeTe0.65Se0.35 under the influence of hydrogen sorption
• Nonreciprocal charge transport in an iron-based superconductor with broken inversion symmetry engineered by a hydrogen-concentration gradient