Evolution from incoherent to coherent electronic states and its implications to superconductivity in FeTe1-xSex

Abstract

We have performed systematic angle-resolved photoemission spectroscopy (ARPES) of iron-chalcogenide superconductor FeTe1-xSex to elucidate the electronic states relevant to the superconductivity. While the Fermi-surface shape is nearly independent of x, we found that the ARPES spectral line shape shows prominent x dependence. A broad ARPES spectrum characterized by a small quasiparticle weight at x = 0, indicative of incoherent electronic states, becomes progressively sharper with increasing x, and a well-defined quasiparticle peak appears around x = 0.45 where bulk superconductivity is realized. The present result suggests the evolution from incoherent to coherent electronic states and its close relationship to the emergence of superconductivity.

arXiv comment6 pages, 3 figures

References in corpus (31)

• Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3
• Phase Diagram and High Temperature Superconductivity at 65 K in Tuning Carrier Concentration of Single-Layer FeSe Films
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• First-order magnetic and structural phase transitions in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$
• Reply to Comment on "Unconventional s-wave superconductivity in Fe(Se,Te)"
• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• Substitution Effects on FeSe Superconductor
• A review of Fe-chalcogenide superconductors: the simplest Fe-based superconductor
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• From (pi, 0) magnetic order to superconductivity with (pi, pi) magnetic resonance in Fe1.02(Te1-xSex)
• Charge carrier localization induced by excess Fe in the Fe1+y(Te,Se) superconductor system
• Spin Gap and Resonance at the Nesting Wavevector in Superconducting FeSe0.4Te0.6
• Band Structure and Fermi Surface of an Extremely Overdoped Iron-Based Superconductor KFe2As2
• Fermi surface topology and low-lying quasiparticle dynamics of parent Fe${}_{1+x}$Te/Se Superconductor by orbital-polarization resolved ARPES
• Electronic properties of single-crystalline Fe${}_{1.05}$Te and Fe${}_{1.03}$Se${}_{0.30}$Te${}_{0.70}$
• Fermi surface topology and low-lying quasiparticle structure of magnetically ordered Fe1+xTe
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• Coherence-Incoherence and Dimensional Crossover in Layered Strongly Correlated Metals
• Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe0.55Se0.45
• Electronic structure of heavily electron-doped BaFe${}_{1.7}$Co${}_{0.3}$As${}_2$ studied by angle-resolved photoemission
• Nesting between hole and electron pockets in Ba(Fe1-xCox)2As2 (x=0-0.3) observed with angle-resolved photoemission
• Unusual Relationship between Magnetism and Superconductivity in FeTe${}_{0.5}$Se${}_{0.5}$
• Strong correlation and massive spectral-weight redistribution induced spin density wave in a-Fe1.06Te
• Measurement of Coherent Polarons in the Strongly Coupled Antiferromagnetically Ordered Iron-Chalcogenide Fe1.02Te using Angle-Resolved Photoemission Spectroscopy
• Phosphor induced significant hole-doping in ferropnictide superconductor BaFe2(As(1-x)Px)2
• 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
• Effects of Ru Substitution on Dimensionality and Electron Correlations in Ba(Fe_{1-x}Ru_x)_2As_2

Cited by in corpus (29)

• Role of the orbital degree of freedom in iron-based superconductors
• Electronic Structure and Superconductivity of FeSe-Related Superconductors
• Forces for Structural Optimizations in Correlated Materials within DFT+Embedded DMFT Functional Approach
• FeTe${}_{1-x}$Se${}_x$ monolayer films: towards the realization of high-temperature connate topological superconductivity
• Experimental Observation of Incoherent-Coherent Crossover and Orbital Dependent Band Renormalization in Iron Chalcogenide Superconductors
• Magnetic, superconducting, and topological surface states on Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Non-Thermal Emergence of an Orbital-Selective Mott Phase in FeTe${}_{1-x}$Se${}_x$
• Correlation-Driven Electronic Reconstruction in FeTe${}_{1-x}$Se${}_x$
• Enhanced Spin-polarization via Partial Ge1-dimerization as the Driving Force of the 2$\times$2$\times$2 CDW in FeGe
• Correlation-driven topological Fermi surface transition in FeSe
• Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory
• Effect of electron correlations on the electronic structure and phase stability of FeSe upon lattice expansion
• Dichotomy of superconductivity between monolayer FeS and FeSe
• FeTe${}_{0.55}$Se${}_{0.45}$: a multiband superconductor in the clean and dirty limit
• Tuning electronic properties of FeSe${}_{0.5}$Te${}_{0.5}$ thin flakes by a novel field effect transistor
• Decoupled Pairing Amplitude and Electronic Coherence in Iron-Based Superconductors
• LDA+DMFT approach to ordering phenomena and the structural stability of correlated materials
• Electronic structure of Bi2Te3/FeTe heterostructure: implications for unconventional superconductivity
• Incoherent-coherent crossover and the pseudogap in Te-annealed superconducting Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ revealed by magnetotransport measurements
• Monolayer superconductivity and tunable topological electronic structure at the Fe(Te,Se)/Bi2Te3 interface
• Investigation of correlation effects in FeSe and FeTe by LDA + U method
• Low energy magnetic excitations from the Fe${}_{1+y-z}$(Ni/Cu)${}_z$Te${}_{1-x}$Se${}_x$ system
• Resurgence of superconductivity and the role of $d_{xy}$ hole band in FeSe${}_{1-x}$Te${}_x$
• Effect of electron doping in FeTe${}_{1-y}$Se${}_y$ realized by Co and Ni substitution
• Photoemission studies of the near Fermi level spectral weight shifts in FeSe1-xTex superconductor
• Photoinduced nematic state in FeSe${}_{0.4}$Te${}_{0.6}$
• Electronic phase diagram of Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ revealed by magnetotransport measurements
• Evolution of charge dynamics in FeSe${}_{1-x}$Te${}_x$: Effects of electronic correlations and nematicity
• Electronic phase diagram in Te-annealed superconducting FeTe${}_{1-x}$Se${}_x$ revealed by magnetic susceptibility