Phase Diagram of KxFe2-ySe2-zSz and the Suppression of its Superconducting State by an Fe2-Se/S Tetrahedron Distortion

Abstract

We report structurally tuned superconductivity in KxFe2-ySe2-zSz (0<=z<=2) phase diagram. Superconducting Tc is suppressed as S is incorporated into the lattice, eventually vanishing at 80% of S. The magnetic and conductivity properties can be related to stoichiometry on poorly occupied Fe1 site and the local environment of nearly fully occupied Fe2 site. The decreasing Tc coincides with the increasing Fe1 occupancy and the overall increase in Fe stoichiometry from z = 0 to z = 2. Our results indicate that the irregularity of Fe2-Se/S tetrahedron is an important controlling parameter that can be used to tune the ground state in the new superconductor family.

5 pages, 4 figures

References in corpus (15)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide
• Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln=La,Nd)
• Heavily electron-doped electronic structure and isotropic superconducting gap in AxFe2Se2 (A=K,Cs)
• Fe-based high temperature superconductivity with Tc=31K bordering an insulating antiferromagnet in (Tl,K)FexSe2 Crystals
• Superconductivity up to 30 K in the vicinity of quantum critical point in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• The effect of varying Fe-content on transport properties of K intercalated iron selenide KxFe2-ySe2
• Iron vacancy superstructure and possible room temperature antiferromagnetic order in superconducting Cs_{y}Fe_{2-x}Se_2
• 77Se NMR Investigation of the K(x)Fe(2-y)Se(2) High Tc Superconductor (Tc=33K)
• Electronic structure and Fermi surface of new K intercalated iron selenide superconductor KxFe2Se2
• Spin glass behavior of insulating K0.8Fe2-xS2
• Anisotropy in transport and magnetic properties of K0.64Fe1.44Se2
• Room temperature antiferromagnetic order in superconducting X_yFe_{2-x}Se_ 2, (X= Rb, K): a powder neutron diffraction study

Cited by in corpus (38)

• Superconductivity in Iron Compounds
• The Unexpected Properties of Alkali Metal Iron Selenide Superconductors
• Phase relations in K_xFe_{2-y}Se_2 and the structure of superconducting K_xFe_2Se_2 via high-resolution synchrotron diffraction
• Interplay between magnetism and superconductivity in iron-chalcogenide superconductors: crystal growth and characterizations
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Superconductivity and phase instability of NH3-free Na-intercalated FeSe1-zSz
• Strong anisotropy in nearly ideal-tetrahedral superconducting FeS single crystals
• Superconductivity in the iron selenide KxFe2Se2 (0 <= x <= 1)
• New ternary ThCr2Si2-type iron-selenide superconducting materials: synthesis, properties and simulations
• The intercalation chemistry of layered iron chalcogenide superconductors
• Spin Glass and Semiconducting Behavior in 1D BaFe2-δSe3 Crystals
• Multi-band superconductivity and large anisotropy in FeS crystals
• Structural, Magnetic and Electronic Properties of the Iron-Chalcogenide A${}_x$Fe${}_{2-y}$Se${}_2$ (A=K, Cs, Rb, Tl and etc.) Superconductors
• Electronic structure of FeSe monolayer superconductors
• Structure and physical properties of new layered iron oxychalcogenide BaFe2OSe2
• Identification of prototypical Brinkman-Rice Mott physics in a class of iron chalcogenides superconductors
• Local structural disorder and superconductivity in KxFe2-ySe2
• Superconductivity and Phase Diagram in (Li${}_{0.8}$Fe${}_{0.2}$)OHFeSe${}_{1-x}$S${}_x$
• Bandwidth and Electron Correlation-Tuned Superconductivity in Rb${}_{0.8}$Fe${}_2$(Se${}_{1-z}$S${}_z$)${}_2$
• Two spatially separated phases in semiconducting Rb${}_{0.8}$Fe${}_{1.5}$S${}_2$
• Emergence of magnetism and controlling factors of superconductivity in Li/Na-ammonia co-intercalated FeSe1-zTez
• Physical properties of $A_x$Fe${}_{2-y}$S${}_2$ ($A$=K, Rb and Cs) single crystals
• Correlated disorder to order crossover in the local structure of K${}_x$Fe${}_{2-y}$Se${}_{2-z}$S${}_z$
• Elucidating the magnetic and superconducting phases in the alkali metal intercalated iron chalcogenides
• Insulating and metallic spin glass in K${}_x$Fe${}_{2-\delta -y}$Ni${}_y$Se${}_2$ (0.06 $\le$ $y$ $\le$ 1.44) single crystals
• Enhanced superconductivity and anisotropy of FeTe0.6Se0.4 single crystals with Li-NH3 intercalation
• Suppression of Superconductivity and Nematic Order in Fe${}_{1-y}$Se${}_{1-x}$S${}_x$ (0$\le$$x$$\le$1, $y$$\le$0.1) Crystals by Anion Height Disorder
• Correlation effects in the electronic structure of the Ni-based superconducting KNi2S2
• Tuning orbital-selective correlation effects in superconducting Rb${}_{0.75}$Fe${}_{1.6}$Se${}_{2-z}$S${}_z$
• Structure, superconductivity, and magnetism in Rb1-xFe1.6Se2-zSz
• Evolution of the Pauli spin-paramagnetic effect on the upper critical fields of K${}_x$Fe${}_{2-y}$Se${}_{2-z}$S${}_z$ single crystals
• Connection between ambient-pressure and pressure-induced superconducting phases in alkaline iron selenide superconductors
• Sustained phase separation and spin glass in Co-doped K${}_x$Fe${}_{2-y}$Se${}_2$ single crystals
• Spin waves in the block checkerboard antiferromagnetic phase
• NMR Characterization of Sulphur Substitution Effects in the K(x)Fe(2-y)Se(2-z)S(z) high Tc Superconductor
• Nonmetallic Low-Temperature Normal State of K0.70Fe1.46Se1.85Te0.15
• Effects of Chemical Pressure on Superconductivity in Electrochemically Intercalated (TMA)yFe2(Se1-xSx)2 (TMA = Tetramethylammonium)
• Multiband behavior and non-metallic low-temperature state of K${}_{0.50}$Na${}_{0.24}$Fe${}_{1.52}$Se${}_2$