Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2

Abstract

The ternary iron arsenide BaFe2As2 becomes superconducting by hole doping, which was achieved by partial substitution of the barium site with potassium. We have discovered bulk superconductivity up to Tc = 38 K in (Ba1-xKx)Fe2As2 with x = 0.4. The parent compound BaFe2As2 as well as KFe2As2 both crystallize in the tetragonal ThCr2Si2-type structure, which consists of (FeAs)- iron arsenide layers separated by barium or potassium ions. BaFe2As2 is a poor metal and exhibits a SDW anomaly at 140 K. By substituting Ba2+ for K+ ions we have introduced holes in the (FeAs)- layers, which suppress the SDW anomaly and induce superconductivity. This scenario is very similar to the recently discovered arsenide-oxide superconductors. The Tc of 38 K in (Ba1-xKx)Fe2As2 is the highest observed critical temperature in hole doped iron arsenide superconductors so far. Therefore, we were able to expand this class of superconductors by oxygen-free compounds with the ThCr2Si2-type structure. Our results suggest, that superconductivity in these systems essentially evolves from the (FeAs)- layers and may occur in other related compounds.

4 pages, 5 figures, submitted to Phys. Rev. Lett

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• Anion height dependence of Tc and density of states in iron based superconductors
• Evolution of the bulk properties, structure, magnetic order, and superconductivity with Ni doping in CaFe2-xNixAs2
• Neutron scattering investigation of the magnetic order in single crystalline BaFe2As2
• The role of different negatively charged layers in Ca10(Fe1-xPtxAs)10(Pt3+yAs8) and superconductivity at 30 K in electron-doped (Ca0.8La0.2)10(FeAs)10(Pt3As8)
• Excitonic spin density wave state in iron pnictides
• Narrow Bandgap in beta-BaZn2As2 and Its Chemical Origins
• Electrochemical synthesis and crystal structure of the organic ion intercalated superconductor (TMA)0.5Fe2Se2 with Tc = 43 K
• Suppression of the structural phase transition and lattice softening in slightly underdoped Ba(1-x)K(x)Fe2As2 with electronic phase separation
• Superconductivity without Fe or Ni in the phosphides BaIr2P2 and BaRh2P2
• Insular superconductivity in Co-doped iron pnictide CaFe${}_{1-x}$Co${}_x$AsF
• $\pi$-junction to probe antiphase s-wave pairing in iron pnictide superconductors
• Heat capacity measurements on FeAs-based compounds: a thermodynamic probe of electronic and magnetic states
• Optical conductivity of iron-based superconductors
• Synthesis, Structure and Properties of Tetragonal Sr2M3As2O2 (M3 = Mn3, Mn2Cu and MnZn2) Compounds Containing Alternating CuO2-Type and FeAs-Type Layers
• Proximity of LaOFeAs to a magnetic instability
• Thermodynamic properties of Ba1-xMxFe2As2 (M = La and K)
• Room temperature antiferromagnetic order in superconducting X_yFe_{2-x}Se_ 2, (X= Rb, K): a powder neutron diffraction study
• Interplay between superconductivity and magnetism in K-doped EuFe2As2
• Superconductivity in LnFePO (Ln = La, Pr, and Nd) single crystals
• Synthesis, structural and transport properties of the hole-doped Superconductor Pr_{1-x}Sr_xFeAsO
• Itinerant Nature of Magnetism in Iron Pnictides: A first principles study
• Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy
• The Electronic Phase Diagram of the Iron-based High Tc Superconductor Ba(Fe(1-x)Co(x))2As2 Under Hydrostatic Pressure (0 < x <0.099)
• High-performance Ba1-xKxFe2As2 superconducting tapes with grain texture engineered via a scalable and cost-effective fabrication
• Full Gap Superconductivity in Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ Probed by Muon Spin Rotation
• Effects of Ru Substitution on Dimensionality and Electron Correlations in Ba(Fe_{1-x}Ru_x)_2As_2
• Metamagnetic transition in Ca${}_{1-x}$Sr${}_x$Co${}_2$As${}_2$($x$ = 0 and 0.1) single crystals
• Local Magnetic Inhomogeneities in Lightly Doped BaFe${}_2$As${}_2$
• Microwave Surface Impedance Measurements of LiFeAs Single Crystals
• Magnetic structure of the Eu2+ moments in superconducting EuFe2(As1-xPx)2 with x = 0.19
• Critical current and vortex dynamics in single crystals of Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Coincident structural and magnetic order in BaFe${}_2$(As${}_{1-x}$)P${}_x$)${}_2$ revealed by high-resolution neutron diffraction
• Density Functional Study of the Over-Doped Iron Chalcogenide: TlFe${}_2$Se${}_2$ with ThCr${}_2$Si${}_2$ structure
• Manipulation of gap nodes by uniaxial strain in iron-based superconductors
• Specific heat in KFe2As2 in zero and applied magnetic field
• (Ca,Na)(Zn,Mn)2As2: a new spin & charge doping decoupled diluted ferromagnetic semiconductor with hexagonal CaAl2Si2 structure
• Suppression of spin density wave by isoelectronic substitution in PrFe(1-x)Ru(x)AsO
• Intrinsic and extrinsic pinning in NdFeAs(O,F): vortex trapping and lock-in by the layered structure
• Electronic and lattice dynamical properties of the iron-based superconductors LiFeAs and NaFeAs
• A novel non-Fermi-liquid state in the iron-pnictide FeCrAs
• Distinct high-T transitions in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Advanced first-principles theory of superconductivity including both lattice vibrations and spin fluctuations: The case of FeB${}_4$
• Intrinsic crystal phase separation in antiferromagnetic superconductor RbyFe2-xSe2: a diffraction study
• Single crystal growth and superconducting properties of LiFeAs
• Resistivity and magnetoresistance of FeSe single crystals under Helium-gas pressure
• Superconducting fluctuations in the reversible magnetization of the iron-pnictide $B{a}_{1-x}{K}_{x}F{e}_{2}A{s}_2$
• Fermi-Surface Reconstruction and Complex Phase Equilibria in CaFe${}_2$As${}_2$
• Fabrication of small superconducting coils using (Ba,A)Fe2As2 (A: Na, K) round wires with large critical current densities
• Metastable superconducting state in quenched KxFe2-ySe2
• Spin waves and magnetic exchange interactions in the spin ladder compound RbFe${}_2$Se${}_3$
• Electric double-layer transistor using layered iron selenide Mott insulator TlFe1.6Se2
• Anisotropic fluctuations and quasiparticle excitations in FeSe_0.5Te_0.5
• Elastic properties and chemical bonding in ternary arsenide SrFe2As2 and quaternary oxyarsenide LaFeAsO - basic phases for new 38-55K superconductors
• (Sr,Na)(Zn,Mn)2As2: A new diluted ferromagnetic semiconductor with the hexagonal CaAl2Si2 type structure
• Magnetic order in orbital models of the iron pnictides
• Microscopic study of the effect of impurities on the first order spin density wave transition in BaFe${}_2$As${}_2$
• The superconductor KxSr(1-x)Fe2As2: Normal state and superconducting properties
• Similar zone-center gaps in the low-energy spin-wave spectra of NaFeAs and BaFe2As2
• Magnetic excitations in underdoped Ba(Fe1-xCox)2As2 with x=0.047
• Energy-scale phenomenology and pairing via resonant spin-charge motion in FeAs, CuO, heavy-fermion and other exotic superconductors
• High-Tc Superconductivity in some Heavy Rare-earth Iron-arsenide REFeAsO1-delta(RE = Ho, Y, Dy and Tb) Compounds
• Spin-phonon coupling and pressure effect in the superconductor LiFeAs : Lattice dynamics from first-principles calculations
• Perturbation Theory of High-Tc Superconductivity in Iron Pnictides
• Superconductivity induced by oxygen deficiency in Sr-doped LaOFeAs
• Pressure effect on superconductivity of $A_x$Fe${}_2$Se${}_2$ ($A$ = K and Cs)
• Anomalous dependence of the c-axis polarized Fe B${}_{1g}$ phonon mode with Fe and Se concentrations in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• The magnetic moment enigma in Fe-based high temperature superconductors
• Flux-free growth of large superconducting crystal of FeSe by traveling-solvent floating-zone technique
• Crystallography and Physical Properties of BaCo2As2, Ba{0.94}K{0.06}Co2As2 and Ba{0.78}K{0.22}Co2As2
• Unconventional density waves and superconductivities in Fe-based superconductors and other strongly correlated electron systems
• Magnetic anisotropy in hole-doped superconducting Ba 0.67K 0.33Fe 2As2 probed by polarized inelastic neutron scattering
• The optical phonon spectrum of SmFeAsO
• Multiorbital Effects on Antiferromagnetism in Fe Pnictides
• Origin of the superconducting state in the collapsed tetragonal phase of KFe2As2
• Enhancement of critical current density in (Ba,Na)Fe2As2 round wires using high-pressure sintering
• Strong Pauli paramagnetic effect in the upper critical field of KCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Iron-platinum-arsenide superconductors Ca10(PtnAs8)(Fe2-xPtxAs2)5
• Incommensurate antiferromagnetic fluctuations in single-crystalline LiFeAs studied by inelastic neutron scattering
• Fermi surface reconstruction in (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$ (0.44 $\le x\le$ 1) probed by thermoelectric power measurements
• Anisotropic Superconductivity of Ca1-xLaxFeAs2 (x ~ 0.18) Single Crystal
• Magnetic property and crystalline electric field effect in ThCr${}_2$Si${}_2$-type CeNi${}_2$As${}_2$
• Symmetry of re-entrant tetragonal phase in Ba1-xNaxFe2As2: Magnetic versus orbital ordering mechanism
• Pressure Suppression of Electron Correlation in the Collapsed Tetragonal Phase of $CaF{e}_{2}A{s}_2$ : A DFT-DMFT Investigation
• Single-crystal growth of the ternary BaFe${}_2$As${}_2$ phase using the vertical Bridgman technique
• Polarized neutron scattering studies of magnetic excitations in electron-overdoped superconducting BaFe${}_{1.85}$Ni${}_{0.15}$As${}_2$
• Formation of Collapsed Tetragonal Phase in EuCo2As2 under High Pressure
• Heat capacity double transitions in time-reversal symmetry broken superconductors
• Discovery of a novel 112-type iron-pnictide and La-doping induced superconductivity in Eu1-xLaxFeAs2 (x = 0 ~ 0.15)
• Competition between superconductivity and magnetic/nematic order as a source of anisotropic superconducting gap in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• NMR and NQR studies on transition-metal arsenide superconductors LaRu2As2, KCa2Fe4As4F2, and A2Cr3As3
• Electronic structure of single-crystalline Sr(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by x-ray absorption spectroscopy: Evidence for isovalent substitution of Fe${}^{2+}$ by Co${}^{2+}$
• Leggett mode in a strong-coupling model of iron arsenide superconductors
• Anisotropy of incommensurate magnetic excitations in slightly overdoped Ba${}_{0.5}$K${}_{0.5}$Fe${}_2$As${}_2$ probed by polarized inelastic neutron scattering experiments
• Chemistry and High Temperature Superconductivity
• Understanding doping, vacancy, lattice stability and superconductivity in KxFe2-ySe2
• Eliashberg theory for spin-fluctuations mediated superconductivity -- Application to bulk and monolayer FeSe
• Modulation of the Octahedral Structure and Potential Superconductivity of La${}_3$Ni${}_2$O${}_7$ through Strain Engineering
• Band-selective clean- and dirty-limit superconductivity with nodeless gaps in the bilayer iron-based superconductor CsCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Temperature dependence of the paramagnetic spin excitations in BaFe${}_2$As${}_2$
• Weak superconducting fluctuations and small anisotropy of the upper critical fields in an Fe1.05Te0.85Se0.15 single crystal
• Competition/Coexisitence of Magnetism and Superconductivity in Iron Pnictides Probed by Muon Spin Rotation
• Interplane resistivity of underdoped single crystals (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$, $0\le x<0.34$
• Crystal growth and phase diagram of 112-type iron pnictide superconductor Ca1-yLayFe1-xNixAs2
• Temperature-concentration phase diagram of (Ca1-xLax)10(Pt3As8)(Fe2As2)5 superconductors
• Effect of the tetrahedral distortion on the electronic properties of iron-pnictides
• Bulk Superconductivity in Fe1+yTe0.6Se0.4 Induced by Removal of Excess Fe
• Magnetic and lattice coupling in single-crystal SrFe${}_2$As${}_2$: A neutron scattering study
• Suppression of superconductivity by V-doping and possible magnetic order in Sr2VO3FeAs
• Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors
• Fermi surface of Ba{1-x}KxFe2As2 as probed by angle-resolved photoemission
• Co-co-doping effect for (Ca,RE)FeAs2 sintered bulk
• Nodes vs. minima in the energy gap of iron-pnictides from field-induced anisotropy
• Strong carrier-scattering in iron-pnictide superconductors with highest Tc obtained from charge transport experiments
• The anomaly Cu doping effects on LiFeAs superconductors
• Enhanced superconducting properties in FeCr${}_x$Se
• Theory of High-Tc Superconductivity: Accurate Predictions of Tc
• Incommensurate spin-density wave and magnetic lock-in transition in CaFe4As3
• Shapiro Steps as a Direct Probe of $\pm s$-wave Symmetry in Multi-gap Superconducting Josephson Junctions
• 75As-NMR studies on La FeAsO1-xFx (x=0.14) under a pressure of 3GPa
• First-principles study of magnetic frustration in FeSe epitaxial films on SrTiO${}_3$
• Superconductivity and Phase Diagram in (Li${}_{0.8}$Fe${}_{0.2}$)OHFeSe${}_{1-x}$S${}_x$
• The suppression of Curie temperature by Sr doping in diluted ferromagnetic semiconductor (La1-xSrx)(Zn1-yMny)AsO
• Influence of substrate type on transport properties of superconducting FeSe0.5Te0.5 thin films
• Correlation-induced self-doping in intercalated iron-pnictide superconductor Ba2Ti2Fe2As4O
• First-principles investigation of effect of pressure on BaFe${}_2$As${}_2$
• Two-dimensional magnetism in the pnictide superconductor parent material SrFeAsF probed by muon-spin relaxation
• Superconductivity and magnetism in platinum-substituted SrFe2As2 single crystals
• Critical Slowing Down of Quadrupole and Hexadecapole Orderings in Iron Pnictide Superconductor
• Clarification as to why alcoholic beverages have the ability to induce superconductivity in Fe_{1+d}Te_{1-x}S_x
• Large transport Jc in Cu-sheathed Sr0.6K0.4Fe2As2 superconducting tape conductors
• Properties of KCo${}_2$As${}_2$ and Alloys with Fe and Ru: Density Functional Calculations
• Evolution of London penetration depth with scattering in single crystals of K${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$
• Critical Behavior of the SDW Transition in Underdoped Ba(Fe1-xCox)2As2 (x <=0.05): 75As NMR Investigation
• Superconductivity in 122-type antimonide BaPt${}_2$Sb${}_2$
• Disorder effects and current percolation in FeAs based superconductors
• Crystal growth and the electronic phase diagram of the 4$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Rh${}_x$As in comparison with 3$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Co${}_x$As
• Superconductivity in Uncollapsed Tetragonal LaFe2As2
• Penetration depth, lower critical fields, and quasiparticle conductivity in Fe-arsenide superconductors
• Ferromagnetic cluster-glass phase in Ca(Co,Ir)2As2 crystals
• Spontaneous time-reversal symmetry breaking by disorder in superconductors
• Electronic structures of quasi-one-dimensional cuprate superconductors Ba${}_2$CuO${}_{3+\delta }$
• Fermi surface in BaNi${}_2$P${}_2$
• Inverse magnetic hysteresis of the Josephson supercurrent: study of the magnetic properties of thin niobium/permalloy (Fe_{20}Ni_{80}) interfaces
• Magnetic and structural transitions in La${}_{0.4}$Na${}_{0.6}$Fe${}_2$As${}_2$ single crystals
• Theoretical Investigation of Optical Conductivity in Ba [Fe(1-x)Co(x)]2 As2
• Tunable Cobalt Vacancies and Related Properties in LaCoxAs2
• Spin anisotropy due to spin-orbit coupling in optimally hole-doped Ba${}_{0.67}$K${}_{0.33}$Fe${}_2$As${}_2$
• Anomalous phonon redshift in K-doped BaFe2As2 iron pnictides
• Anisotropic Superconducting Properties of Optimally Doped BaFe${}_2$(As${}_{0.65}$P${}_{0.35}$)${}_2$ under Pressure
• Electronic structure of iron-based superconductors: from pnictides to chalcogenides and other similar systems
• Pressure- and temperature-induced structural phase transitions of CaFe${}_2$As${}_2$ and BaFe${}_2$As${}_2$ studied in the Hund's rule correlation picture
• Heavily Hydride-ion-doped 1111-type Iron-based Superconductors: Synthesis, Physical Properties and Electronic Structure
• Hidden $(\pi ,0)$ instability as an itinerant origin of bicollinear antiferromagnetism in Fe${}_{1+x}$Te
• Superfluid density and superconducting gaps of RbFe_{2}As_{2} as a function of hydrostatic pressure
• HHG-laser-based time- and angle-resolved photoemission spectroscopy of quantum materials
• Parabolic versus elliptic focusing - Optimization of the focusing design of a cold triple-axis neutron spectrometer by Monte-Carlo simulations
• Electronic Structure of New AFFeAs Prototype of Iron Arsenide Superconductors
• Superconductivity in PbO-type Fe chalcogenides
• Novel multiple-band superconductor SrPt2As2
• Interplay between superconductivity and chiral symmetry breaking in a (2+1)-dimensional model with compactified spatial coordinate
• The influence of the in-plane lattice constant on the superconducting transition temperature of FeSe0.7Te0.3 thin films
• Transport and magnetic properties of La-doped CaFe${}_2$As${}_2$
• Possible unconventional superconductivity in substituted BaFe${}_2$As${}_2$ revealed by magnetic pair-breaking studies
• Quasiclassical description of a superconductor with a spin density wave
• Evidence for Local Moment by Electron Spin Resonance Study on Polycrystalline LaFeAsO${}_{1-x}$F${}_x$ (x=0 and 0.13)
• Possible Superconductivity in Fe-Sb Based Materials: Density Functional Study of LiFeSb
• Lattice dynamics of KNi2Se2
• New Series of Nickel-Based Pnictide Oxide Superconductors (Ni2Pn2)(Sr4Sc2O6) (Pn = P, As)
• Collapsed Tetragonal Phase Transition in LaRu${}_2$P${}_2$
• Stoichiometry, Spin Fluctuations, and Superconductivity in LaNiPO
• Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry
• Band structure of SrFeAsF and CaFeAsF as parent phases for a new group of oxygen-free FeAs superconductors
• Spin excitations in hole-overdoped iron-based superconductors
• Upper critical field and quantum oscillations in tetragonal superconducting FeS
• Muon-spin rotation and magnetization studies of chemical and hydrostatic pressure effects in EuFe_{2}(As_{1-x}P_{x})_{2}
• Origin of the non-monotonic variance of Tc in the 1111 iron based superconductors with isovalent doping
• (Sr3La2O5)(Zn1-xMnx)2As2: A Bulk Form Diluted Magnetic Semiconductor isostructural to the "32522" Fe-based Superconductors
• Critical current density and magnetic phase diagram of BaFe1.29Ru0.71As2 Single Crystals
• Flipping of antiferromagnetic to superconducting states in pressurized quasi-one-dimensional manganese-based compounds
• Magnetism and superconductivity in Sr${}_2$VFeAsO${}_3$ revealed by ${}^{75}$As- and ${}^{51}$V-NMR under elevated pressures
• Spin excitation anisotropy in optimal-isovalent-doped superconductor BaFe2(As0.7P0.3)2
• Synthesis, structural and physical properties of ${\delta }^{\prime }$-FeSe${}_{1-x}$
• Synthesis of Electron- and Hole-Doped Bulk BaFe2As2 Superconductors by Mechanical Alloying
• Interband Quasiparticle Scattering in Superconducting LiFeAs Reconciles Photoemission and Tunneling Measurements
• Evidence for Coexistence of Superconductivity and Magnetism in Single Crystals of Co-doped SrFe${}_2$As${}_2$
• Large $D-2$ Theory of Superconducting Fluctuations in a Magnetic Field and its Application to Iron-Pnictides
• Electron spin resonance in Eu based Fe pnictides
• Quenched Fe Moment in the Collapsed Tetragonal Phase of Ca${}_{1-x}$Pr${}_x$Fe${}_2$As${}_2$
• Conventional type-II superconductivity in locally non-centrosymmetric LaRh${}_2$As${}_2$ single crystals
• Effects of Vanadium doping on BaFe2As2
• Structural, electronic, and dynamical properties of the tetragonal and collapsed tetragonal phases of KFe${}_2$As${}_2$
• Superconducting Properties and Phase Diagram of Indirectly Electron-Doped (Sr1-xLax)Fe2As2 Epitaxial Films Grown by Pulsed Laser Deposition
• Doping evolution of antiferromagnetism and transport properties in the non-superconducting BaFe2-2xNixCrxAs2
• Magnetothermoelectric effects in Fe{1+d}Te{1-x}Se{x}
• Macroscopic quantum tunneling in multigap superconducting Josephson junctions: Escape rate enhancement via quantum fluctuations of Josephson-Leggett mode
• Experimental investigation of the electronic structure of Ca${}_{0.83}$La${}_{0.17}$Fe${}_2$As${}_2$
• Sr${}_{0.9}$K${}_{0.1}$Zn${}_{1.8}$Mn${}_{0.2}$As${}_2$: a ferromagnetic semiconductor with colossal magnetoresistance
• Simultaneous measurement of pressure evolution of crystal structure and superconductivity in FeSe0.92 using designer diamonds
• Muon spin rotation and infrared spectroscopy study of $B{a}_{1-x}N{a}_{x}F{e}_{2}A{s}_2$
• Scanning tunneling microscopy of the 32 K superconductor (Sr1-xKx)Fe2As2
• High upper critical field (120 T) with small anisotropy of highly hydrogen-substituted SmFeAsO epitaxial film
• Revisiting the electron-doped SmFeAsO: enhanced superconductivity up to 58.6 K by Th and F codoping
• Superconductivity enhanced by pair fluctuations between wide and narrow bands
• K-doped Ba122 epitaxial thin film on MgO substrate by buffer engineering
• Electronic structure of ThRu2Si2 studied by angle-resolved photoelectron spectroscopy: Elucidating the contribution of U 5f states in URu2Si2
• Realization of epitaxial thin films of the superconductor K-doped BaFe${}_{\text{2}}$As${}_{\text{2}}$
• Conventional Superconductivity in Fe-Based Pnictides: the Relevance of Intra-Band Electron-Boson Scattering
• Nano-scale Inhomogeneous Superconductivity in Fe(Te1-xSex) Probed by Nanostructure-transport
• Crystal structure and properties of iron-based spin-chain compound Ba9Fe3Se15
• Determination of characteristic muon precession and relaxation signals in FeAs and FeAs2, possible impurity phases in pnictide superconductors
• Enhanced spin density wave in LaOFeSb
• Importance of structural distortions in enhancement of transition temperature in FeSe${}_{1-x}$Te${}_x$ superconductors
• La2Sb, a layered superconductor with metal-metal bonds
• LDA'+DMFT Investigation of Electronic Structure of K{1-x}Fe{2-y}Se2 Superconductor
• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Anomalous Tail Effect on Resistivity Transition and Weak-link Behavior of Iron Based Superconductor
• Upper critical field, critical current density and thermally activated flux flow in CaFFe0.9Co0.1As superconductor
• Electronic Behavior of Superconducting SmFeAsO0.75
• Antiphase magnetic boundaries in iron-based superconductors: A first-principle density-functional theory study
• Dependences on RE of Superconducting Properties of Transition Metal co-doped (Ca,RE)FeAs2 with RE = La-Gd
• Effects of post-annealing and cobalt co-doping on superconducting properties of (Ca,Pr)Fe2As2 single crystals
• Inhomogeneous superconductivity in LuxZr1-xB12 dodecaborides with dynamic charge stripes
• Superconductivity and multiple pressure-induced phases in BaPt${}_2$As${}_2$
• Ultralow-dissipative conductivity by Dirac fermions in BaFe${}_2$As${}_2$
• Raman scattering in iron-based superconductors
• First order transition in trigonal structure $\text{Ca}{\text{Mn}}_2{\text{P}}_2$
• First-principles study on Pr-doped Bilayer Nickelate La3Ni2O7
• Optical and photoemission investigation of structural and magnetic transitions in the iron-based superconductor Sr${}_{0.67}$Na${}_{0.33}$Fe${}_2$As${}_2$
• Interrogating the superconductor Ca10(Pt4As8)(Fe2-xPtxAs2)5 Layer-by-layer
• Local structural studies of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ using atomic pair distribution function analysis
• Upper critical field of the 122-type iron pnictide superconductors
• Study of antiferromagnetic and nematic phase transitions in $BaF{e}_2(A{s}_{1-x}{P}_x{)}_2$ by AC micro-calorimetry and SQUID magnetometry
• The role of correlations in the high-pressure phase of FeSe
• Static and Dynamical Susceptibility of LaO1-xFxFeAs
• Field-Induced Magnetostructural Transitions in Antiferromagnetic Fe1+yTe1-xSx
• Effects of Iodine Annealing on Fe1+yTe0.6Se0.4
• Time-reversal symmetry breaking from lattice dislocations in superconductors
• Anisotropies and Homogeneities of Superconducting Properties in Iron-Platinum-Arsenide Ca10(Pt3As8)(Fe1.79Pt0.21As2)5
• Incoherent electronic band states in Mn-substituted BaFe${}_2$As${}_2$
• Multiple Superconducting Gaps, Anisotropic Spin Fluctuations and Spin-Orbit Coupling in Iron-Pnictides
• Substitution of Ni for Fe in superconducting Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$ depresses the normal-state conductivity but not the magnetic spectral weight
• Intertwined charge, spin, and pairing orders in doped iron ladders
• Synchrotron X-ray Diffraction Study of Structural Phase Transition in Ca10(Ir4As8)(Fe2-xIrxAs2)
• Structure-Property Relationship in Layered BaMn2Sb2 and Ba2Mn3Sb2O2
• Specific Heat of Ca0.33Na0.67Fe2As2
• Dimer Impurity Scattering, "Reconstructed" Nesting and Density-Wave Diagnostics in Iron Pnictides
• Magnetic and Quasiparticle Excitation Spectra of an Itinerant $J_1-J_2$ Model for Iron Pnictide Superconductors
• Flux-lattice melting in LaO${}_{1-x}$F${}_x$FeAs: first-principles prediction
• Spin reorientation of the Fe moments in Eu${}_{0.5}$Ca${}_{0.5}$Fe${}_2$As${}_2$: Evidence for a strong interplay of Eu and Fe magnetism
• Josephson effect and Andreev reflection in Ba(1-x)NaxFe2As2 (x=0.25 and 0.35) point contacts
• Frozen spin ratio and the detection of Hund correlations
• Interplay of magnetism and superconductivity in EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ single crystals probed by muon spin rotation and ${}^{57}$Fe Mössbauer spectroscopy
• Disappearance and Survival of Superconductivity in FeSe under High Pressure
• Competing effective interactions of Dirac electrons in the Spin-Fermion system
• Phase Diagram and Weak-link Behavior in Nd-doped CaFe_2As_2
• Superconductivity by transition metal doping in Ca${}_{10}$(Fe${}_{1-x}$M${}_x$As)${}_{10}$(Pt${}_3$As${}_8$) (M = Co, Ni, Cu)
• Drastic electronic structure reconstruction of Ca${}_{1-x}$Pr${}_x$Fe${}_2$As${}_2$ in the collapsed tetragonal phase
• Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based compound
• Growth of (NaxKy)FezSe2 crystals by chlorides flux at low temperatures
• Spin glassiness and power law scaling in a quasi-triangular spin-1/2 compound
• Superconductivity-induced transverse plasma mode and phonon anomaly in the $c$-axis response of the bilayer compound RbCa${}_2$Fe${}_4$As${}_4$F${}_2$
• X-ray absorption spectroscopy measurement on the LaO1-xFxFeAs system
• Probing Local Variations of Superconductivity on the Surface of Ba(Fe1-xCox)2As2 Single Crystals
• First-principles study on the electron-phonon coupling and magnetoresistance of LaBi under pressure
• Revealing Symmetry-Broken Superconducting Configurations by Density Functional Theory
• Type II superconductivity in SrPd2Ge2
• Temperature-dependent structure of an intermetallic ErPd${}_2$Si${}_2$ single crystal: A combined synchrotron and in-house X-ray diffraction study
• Data analysis of $ab$ $initio$ effective Hamiltonians in iron-based superconductors $\unicode{x2014}$ Construction of predictors for superconducting critical temperature
• 31P NMR Investigation of the Superconductor LiFeP (Tc = 5 K)
• Possible signature of broken symmetry state near the quantum critical point in P doped BaFe${}_2$As${}_2$: A Raman spectroscopy study
• In-situ visualization of local distortions in the high-$T_c$ molecule-intercalated $L{i}_x(C_5{H}_{5}N{)}_{y}F{e}_{2-z}S{e}_2$ superconductor
• A New Noncentrosymmetric Superconducting Phase in the Li-Rh-B System
• High-performance Ba1-xKxFe2As2 superconducting joints for persistent current operation
• Effect of the iron valence in the two types of layers in LiFeO${}_2$Fe${}_2$Se${}_2$
• Delocalization of vortex magnetic field near a planar defect
• Local structural distortions and their role in superconductivity in SmFeAsO${}_{1-x}$F${}_x$ superconductors
• Representation-protected topology of spin-singlet $s$-wave superconductors
• A first principles study on FeAs single layers
• Superconductivity In K- And Na- Doped Bafe2as2: What Can We Learn From Heat Capacity And Pressure Dependence of Tc
• Pressure-temperature phase diagram of CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$ for $x$=0.024
• Orbital-transverse density-wave instabilities in iron-based superconductors
• Huge magnetostriction in superconducting single-crystalline BaFe${}_{1.908}$Ni${}_{0.092}$As${}_2$
• Elastic theory for the vortex-lattice melting in iron-based high-Tc superconductors
• Evolution of Critical Current Density in CaKFe${}_4$As${}_4$ with La-doping
• THz optical response of Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$ films analyzed within the three-band Eliashberg s${}_{\pm }$-wave model
• High-pressure self-flux growth and characterization of Li-deficient Li0.95FeAs single crystals
• Superconducting density of states and vortex lattice of LaRu${}_2$P${}_2$ observed by Scanning Tunneling Spectroscopy
• Re-entrance of resistivity due to the interplay of superconductivity and magnetism in $\ce{Eu_{0.73}Ca_{0.27}(Fe_{0.87}Co_{0.13})2As2}$
• Optimization of a Non-arsenic Iron-based Superconductor for Wire Fabrication
• Breakdown of the Hund's Rule in CuFeAs
• Optimization of Synthesis Parameters and Superconducting Properties of GdFeAsO1-xFx
• Pressure driven magnetic order in Sr${}_{1-x}$Ca${}_x$Co${}_2$P${}_2$
• Emergence of the minority hole with high mobility on the electrical transport in the Fe-pnictides Ba(Fe${}_{1-x}$Mn${}_x$As)${}_2$
• Electronic structure of LaFe1-xCoxAsO from first principle calculations
• Kondo-like behavior in a mixed valent oxypnictide $\mathrm{L}{\mathrm{a}}_3\mathrm{C}{\mathrm{u}}_4{\mathrm{P}}_4{\mathrm{O}}_2$
• Anomalous High-Field Magnetotransport in CaFeAsF due to the Quantum Hall Effect
• Effects of Chemical Pressure on Superconductivity in Electrochemically Intercalated (TMA)yFe2(Se1-xSx)2 (TMA = Tetramethylammonium)
• Nanoscale Interlayer Defects in Iron Arsenides
• Electronic properties and surface states of RbNi${}_2$Se${}_2$
• Suppression of antiferromagnetic order and strong ferromagnetic spin fluctuations in Ni-doped CaCo2As2 single crystals
• In-plane electronic anisotropy revealed by interlayer resistivity measurements on the iron-based superconductor parent compound CaFeAsF
• Impact of atomic defects in the electronic states of FeSe${}_{1-x}$S${}_x$ superconducting crystals
• Electronic Transport and Fermi Surface Topology of Zintl Phase Compound SrZn2Ge2
• Multiband superconductivity and a deep gap minimum from the specific heat in KCa${}_2$(Fe${}_{1-x}$Ni${}_x$)${}_4$As${}_4$F${}_2$ ($x$ = 0, 0.05, 0.13)
• Superconductivity in layered iron Selenide induced by cobalt- and sodium-doping
• Hole doping and electronic correlations in Cr-substituted BaFe${}_2$As${}_2$
• Magnetic phase diagram of Sr${}_{1-x}$Ca${}_x$Co${}_2$P${}_2$
• LaO as a candidate substrate for realizing superconductivity in FeSe epitaxial film
• Magnetic softness in iron-based superconductors
• Phase diagram of the isovalent phosphorous-substituted 122-type iron pnictides
• Reentrance of metal-insulator transition and magnetic competitions on a triangular lattice with second nearest-neighbor hopping
• Filling the holes in the CaFe${}_4$As${}_3$ structure: synthesis and magnetism of CaCo${}_5$As${}_3$
• Evidences for local non-centrosymmetricity and strong phonon anomaly in EuCu2As2: A Raman spectroscopy and lattice dynamics study
• Structural design and multiple magnetic orderings of the intergrowth compound Eu${}_2$CuMn${}_2$P${}_3$
• Crossover of Superconductivity across the antiferromagnetic end point in FeSe${}_{1-\mathrm{x}}$S${}_{\mathrm{x}}$ under pressure
• Van-Hove tuning of Fermi surface instabilities through compensated metallicity
• Effect of Co doping and hydrostatic pressure on SrFe2As2
• Localized and itinerant dichotomy of electrons in Ba(Fe,Co)2As2
• First-principles study of the electronic structure of CaKRu${}_4$P${}_4$
• Tetragonal-phase SnOFeSe: A possible parent compound of FeSe-based superconductor
• Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF
• Stripe Antiferromagnetic Ground-State Configuration of FeSe Revealed by Density Functional Theory
• Crystal growth and characterization of a hole-doped iron-based superconductor Ba(Fe${}_{0.875}$Ti${}_{0.125}$)${}_2$As${}_2$
• Observation of a ubiquitous three-dimensional superconducting gap function in optimally-doped Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$
• Emergence of ferromagnetism due to Ir substitutions in single-crystalline Ba[Co(1 x)Ir(x)]2As2
• PhD Thesis: Electronic correlations in multiorbital systems
• Heat treatment effects on the superconducting properties of Ag-doped SrKFeAs compound
• Antiferromagnetic structure and magnetic properties of Dy2O2Te: An isostructural analog of the rare-earth superconductors R2O2Bi
• Electronic structure of $A$Co${}_2$As${}_2$ ($A=$ Ca, Sr, Ba, Eu) studied using angle-resolved photoemission spectroscopy and theoretical calculations
• Self-regulated growth of candidate topological superconducting parkerite by molecular beam epitaxy