First-order magnetic and structural phase transitions in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$

Abstract

We use bulk magnetic susceptibility, electronic specific heat, and neutron scattering to study structural and magnetic phase transitions in Fe${}_{1+y}$Se% ${}_x$Te${}_{1-x}$. Fe${}_{1.068}$Te exhibits a first order phase transition near 67 K with a tetragonal to monoclinic structural transition and simultaneously develops a collinear antiferromagnetic (AF) order responsible for the entropy change across the transition. Systematic studies of FeSeTe${}_x$ system reveal that the AF structure and lattice distortion in these materials are different from those of FeAs-based pnictides. These results call into question the conclusions of present density functional calculations, where FeSe${}_{1-x}$Te${}_x$ and FeAs-based pnictides are expected to have similar Fermi surfaces and therefore the same spin-density-wave AF order.

5 pages, 3 figures

References in corpus (22)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Theory of Electron Nematic Order in LaOFeAs
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide
• Superconductivity at 25 K in hole doped $(L{a}_{1-x}S{r}_x)OFeAs$
• Lattice and magnetic instabilities in CaFe2As2: A single crystal neutron diffraction study
• Crystal structure of the new FeSe1-x superconductor
• Electron-Hole Symmetry and Magnetic Coupling in Antiferromagnetic LaOFeAs
• Antiferromagnetic superexchange interactions in LaOFeAs
• Spin and Lattice Structure of Single Crystal SrFe2As2
• Lattice and Magnetic structures of PrFeAsO, PrFeAsO0.85F0.15 and PrFeAsO0.85
• Magnetic Order of the Iron Spins in NdOFeAs
• Magnetic Ordering and Negative Thermal Expansion in PrFeAsO

Cited by in corpus (82)

• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• A review of Fe-chalcogenide superconductors: the simplest Fe-based superconductor
• Magnetism in Fe-based superconductors
• Observation of a Robust Zero-energy Bound State in Iron-based Superconductor Fe(Te,Se)
• Iron based superconductors: magnetism, superconductivity and electronic structure
• Iron based high transition temperature superconductors
• Fermi surface topology and low-lying quasiparticle dynamics of parent Fe${}_{1+x}$Te/Se Superconductor by orbital-polarization resolved ARPES
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• Magnetocaloric effect and critical behavior near the paramagnetic to ferrimagnetic phase transition temperature in TbCo2-xFex
• Electronic Structure Calculation by First Principles for Strongly Correlated Electron Systems
• Electronic Structure and Superconductivity of FeSe-Related Superconductors
• Spin waves in the $(\pi ,0)$ magnetically ordered iron chalcogenide Fe${}_{1.05}$Te
• Physical properties of FeSe${}_{0.5}$Te${}_{0.5}$ single crystals grown under different conditions
• Suppression of phase separation and giant enhancement of superconducting transition temperature in FeSe${}_{1-x}$Te${}_x$ thin films
• Doping Driven ($\pi ,0$) Nesting and Magnetic Properties of Fe${}_{1+x}$Te Superconductors
• Dynamics and mechanism of oxygen annealing in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$ single crystal
• Physics and chemistry review of layered chalcogenide superconductors
• Ternary iron selenide K${}_{0.8}$Fe${}_{1.6}$Se${}_2$ is an antiferromagnetic semiconductor
• Control of tetrahedral coordination and superconductivity in FeSe0.5Te0.5 thin films
• Extraordinary quasiparticle scattering and bandwidth-control by dopants in iron-based superconductors
• Short-range incommensurate magnetic order near the superconducting phase boundary in Fe(1+d)Te(1-x)Se(x)
• Electronic and magnetic structures of ternary iron selenides AFe${}_2$Se${}_2$ (A=K, Cs, or Tl)
• First-order structural transition in the magnetically ordered phase of Fe1.13Te
• Low-temperature nuclear and magnetic structures of La2O2Se2.Fe2O from X-ray and neutron diffraction measurements
• Successive phase transitions under high pressure in FeTe0.92
• Strong correlation and massive spectral-weight redistribution induced spin density wave in a-Fe1.06Te
• Calorimetric Evidence of Strong-Coupling Multiband Superconductivity in Fe(Te0.57Se0.43) Single Crystal
• Disappearance of static magnetic order and evolution of spin fluctuations in Fe${}_{1+\delta }$Se${}_x$Te${}_{1-x}$
• Pressure-induced phase transitions and high-pressure tetragonal phase of Fe1.08Te
• Phonon, Two-Magnon and Electronic Raman Scattering of Fe1+yTe1-xSex
• Intergrain effects in the AC susceptibility of polycrystalline LaFeAsO_{0.94}F_{0.06}: comparison with cuprate superconductors
• Improvement of superconducting properties of FeSe0.5Te0.5 single crystals by Mn substitution
• Evidence for a cos(4φ) Modulation of the Superconducting Energy Gap of Optimally Doped FeTe_{0.6}Se_{0.4} Single Crystals Using Laser Angle-Resolved Photoemission Spectroscopy
• Metamorphoses of electronic structure of FeSe-based superconductors (Review article)
• Evolution from incoherent to coherent electronic states and its implications to superconductivity in FeTe1-xSex
• Itinerant Nature of Magnetism in Iron Pnictides: A first principles study
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Density Functional Study of the Over-Doped Iron Chalcogenide: TlFe${}_2$Se${}_2$ with ThCr${}_2$Si${}_2$ structure
• Theory of two magnon Raman scattering in antiferromagnetic iron pnictides
• Disorder-driven electronic localization and phase separation in superconducting Fe1+yTe0.5Se0.5 single crystals
• 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${}_x$
• Pressure induced ferromagnetism in antiferromagnetic Fe_1.03Te
• Magnetic Properties of Ab initio Model for Iron-Based Superconductors LaFeAsO
• Temperature dependence of the paramagnetic spin excitations in BaFe${}_2$As${}_2$
• Effect of 3d Metal (Co and Ni) Doping on the Superconductivity of FeSe0.5Te0.5
• Heavy Electron doping-induced antiferromagnetic phase as the parent for iron-oxypnictide superconductor LaFeAsO1-xHx
• Clarification as to why alcoholic beverages have the ability to induce superconductivity in Fe_{1+d}Te_{1-x}S_x
• 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
• Hidden $(\pi ,0)$ instability as an itinerant origin of bicollinear antiferromagnetism in Fe${}_{1+x}$Te
• Theoretical investigation of FeTe magnetic ordering under hydrostatic pressure
• Superconductivity in PbO-type Fe chalcogenides
• Magnetic order tuned by Cu substitution in Fe1.1-zCuzTe
• A 31T split-pair pulsed magnet for single crystal x-ray diffraction at low temperature
• Magnetism in La2O3(Fe1-xMnx)2Se2 tuned by Fe/Mn ratio
• Origin of doping-induced suppression and reemergence of magnetism in LaFeAsO${}_{1-x}$H${}_x$
• Electronic phase diagram of NdFe1-xRhxAsO
• Magnetothermoelectric effects in Fe{1+d}Te{1-x}Se{x}
• Reversed anisotropy of the in-plane resistivity in the antiferromagnetic phase of iron tellurides
• First-Order Reversal Curves of the Magnetostructural Phase Transition in FeTe
• Nano-scale Inhomogeneous Superconductivity in Fe(Te1-xSex) Probed by Nanostructure-transport
• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Size Dependence of Oxygen-annealing Effects on Superconductivity of Fe{1+y}Te{1-x}S{x}
• Structural and magnetic properties of Fe1+dTe single crystals
• Neutron scattering patterns show Superconductivity in FeTe0.5Se0.5 likely results from itinerant electron fluctuations
• Magnetism and Superconductivity of S-substituted FeTe
• Superconductivity in FeTe0.8S0.2 induced by battery-like reaction
• Field-Induced Magnetostructural Transitions in Antiferromagnetic Fe1+yTe1-xSx
• High-field irreversible moment reorientation in the antiferromagnet Fe${}_{1.1}$Te
• Superconductivity in FeTe{1-x}S_x induced by electrochemical reaction using ionic liquid solution
• Impurity effects on spin dynamics in magnetic and superconducting iron pnictides and chalcogenides
• Small influence of magnetic ordering on lattice dynamics in TaFe${}_{1.25}$Te${}_3$
• Photoemission studies of the near Fermi level spectral weight shifts in FeSe1-xTex superconductor
• Interplay of structure, magnetism, and superconductivity in Se substituted iron telluride with excess Fe
• Superconducting Gap and Symmetry in FeSe_1-x_Te_x_ Studied by Specific Heat in Magnetic Fields
• Magnetic softness in iron-based superconductors
• Indirect K-edge bimagnon resonant inelastic X-ray scattering spectrum of $\alpha$-FeTe
• Paramagnetic spin excitations in insulating Rb${}_{0.8}$Fe${}_{1.6}$Se${}_2$
• Superconductivity and Antiferromagnetism In Fe(Te1-xSx)y System
• Emergent Ising degrees of freedom above double-stripe magnetism
• On the bad metallicity and phase diagrams of Fe${}_{1+\delta }X$ ($X$ =Te, Se, S, solid solutions): an electrical resistivity study