Realization of continuously electron doping in bulk iron selenides and identification of a new superconducting zone

Abstract

It is known that iron selenide superconductors exhibit unique characteristics distinct from iron pnicitides, especially in the electron-doped region. However, acomprehensive study of continuous carrier doping ang the corresponding crystal structures of FeSe is still lacking, mainly due to the difficulties in controlling the carrier density in bulk materials. Here, we report the successful synthesis of a new family of bulk Lix(C3H10N2)0.37FeSe, which features a continue superconducting dome harboring Lifshitz transition within the wide range of 0.06~0.68. We demonstrate that with electron-doped, the anion height of FeSe layers deviates lineraly away from the optimized values of pnictides and pressurized FeSe. This feature leads to anew superconducting zone with unique doping dependence of the electronic structures and strong orbital-selective electronic correlation. Optimal superconductivity is achieved when the Fe 3d t2g orbitals have almost the same intermediate electronic correlation strength, with moderate mass enhancement between 3~4 in the two separate superconducting zone. Our result shed light on archieving unified mechanism of superconductivity in iron-based materials.

References in corpus (54)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Superconductivity in Iron Compounds
• High-temperature superconductivity in iron-based materials
• Gap symmetry and structure of Fe-based superconductors
• A continuous-time solver for quantum impurity models
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Phase Diagram and High Temperature Superconductivity at 65 K in Tuning Carrier Concentration of Single-Layer FeSe Films
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Extreme Sensitivity of Superconductivity to Stoichiometry in FeSe (Fe1+dSe)
• Quantum Monte Carlo Impurity Solver for Cluster DMFT and Electronic Structure Calculations in Adjustable Base
• Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
• Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln=La,Nd)
• Superconductivity up to 29 K in SrFe2As2 and BaFe2As2 at high pressures
• Anion height dependence of Tc for the Fe-based superconductor
• Enhancement of superconducting transition temperature of FeSe by intercalation of a molecular spacer layer
• Iron-Based Superconductors: current status of materials and pairing mechanism
• Structure determination and coexistence of superconductivity and antiferromagnetic order in (Li0.8Fe0.2)OHFeSe
• Selective Mottness as a key to iron superconductors
• Reemerging superconductivity at 48 K across quantum criticality in iron chalcogenides
• Superconductivity at 32 K in single crystal Rb${}_{0.78}$Fe${}_2$Se${}_{1.78}$}
• Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor with Tc=27K
• Structure and superconductivity of LiFeAs
• Direct observation of high temperature superconductivity in one-unit-cell FeSe films
• Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe
• Evolution of high-temperature superconductivity from low-Tc phase tuned by carrier concentration in FeSe thin flakes
• Similarities between structural distortions under pressure and chemical doping in superconducting BaFe2As2
• Magnetism and Charge Dynamics in Iron Pnictides
• Exact double-counting in combining the Dynamical Mean Field Theory and the Density Functional Theory
• Two-dome structure in electron-doped iron arsenide superconductors
• Structure, antiferromagnetism and superconductivity of the layered iron arsenide NaFeAs
• Anomalous correlation effects and unique phase diagram of electron doped FeSe revealed by angle resolved photoemission spectroscopy
• Spin dynamics and an orbital-antiphase pairing symmetry in iron-based superconductors
• Andreev reflection from non-centrosymmetric superconductors and Majorana bound state generation in half-metallic ferromagnets
• Bipartite magnetic parent phases in the iron-oxypnictide superconductor
• Fractional power-law behavior and its origin in iron-chalcogenide and ruthenate superconductors: Insights from first-principles calculations
• Soft chemical control of superconductivity in lithium iron selenide hydroxides Li1-xFex(OH)Fe1-ySe
• Pressure-induced antiferromagnetic transition and phase diagram in FeSe
• Enhanced superconductivity accompanying a Lifshitz transition in electron-doped FeSe monolayer
• High-Tc superconductivity in FeSe at high pressure: Dominant hole carriers and enhanced spin fluctuations
• Superconductivity above 50K in LnFeAsO1-y (Ln= Nd, Sm, Gd, Tb and Dy) Synthesized by High-pressure Technique
• Ab initio Evidence for Strong Correlation Associated with Mott Proximity in Iron-based Superconductors
• Extraordinary quasiparticle scattering and bandwidth-control by dopants in iron-based superconductors
• Experimental Demonstration of the Sign Reversal of the Order Parameter in (Li1-xFex)OHFe1-yZnySe
• Reemergence of high-Tc superconductivity in the (Li1-xFex)OHFe1-ySe under high pressure
• Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe/SrTiO${}_3$
• Superconductivity across Lifshitz transition and anomalous insulating state in surface K-dosed (Li0.8Fe0.2OH)FeSe
• High-Tc superconductivity up to 55 K under high pressure in the heavily electron doped Lix(NH3)yFe2Se2 single crystal
• Coincident structural and magnetic order in BaFe${}_2$(As${}_{1-x}$)P${}_x$)${}_2$ revealed by high-resolution neutron diffraction
• Switching of intra-orbital spin excitations in electron-doped iron pnictide superconductors
• Measurements of the fluctuation-induced in-plane magnetoconductivity at high reduced temperatures and magnetic fields in the iron arsenide BaFe(2-x)NixAs2
• Quasi-2D behavior of 112-type iron-based superconductors

Cited by in corpus (4)

• Superconductivity in Li-intercalated 1T-SnSe2 driven by electric-field gating
• Importance of Fermi surface and magnetic interactions for the superconducting dome in electron doped FeSe intercalates
• Enhancement of Superconductivity Linked with Linear-in-Temperature/Field Resistivity in Ion-Gated FeSe Films
• Short-lived electron excitations in $\mathrm{FeT}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{e}}_{\mathrm{x}}$ as revealed by microwave absorption