Common Electronic Origin of Superconductivity in (Li,Fe)OHFeSe Bulk Superconductor and Single-Layer FeSe/SrTiO3 Films

Abstract

The mechanism of high temperature superconductivity in the iron-based superconductors remains an outstanding issue in condensed matter physics. The electronic structure, in particular the Fermi surface topology, is considered to play an essential role in dictating the superconductivity. Recent revelation of distinct electronic structure and possible high temperature superconductivity with a transition temperature Tc above 65 K in the single-layer FeSe films grown on the SrTiO3 substrate provides key information on the roles of Fermi surface topology and interface in inducing or enhancing superconductivity. Here we report high resolution angle-resolved photoemission measurement on the electronic structure and superconducting gap of a novel FeSe-based superconductor, (Li0.84Fe0.16)OHFe0.98Se, with a Tc at 41 K. We find that this single-phase bulk superconductor shows remarkably similar electronic behaviors to that of the superconducting single-layer FeSe/SrTiO3 film in terms of Fermi surface topology, band structure and nearly isotropic superconducting gap without nodes. These observations provide significant insights in understanding high temperature superconductivity in the single-layer FeSe/SrTiO3 film in particular, and the mechanism of superconductivity in the iron-based superconductors in general.

17 Pages, 4 Figures

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Cited by in corpus (106)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Evolution of high-temperature superconductivity from low-Tc phase tuned by carrier concentration in FeSe thin flakes
• Robust and clean Majorana zero mode in the vortex core of high-temperature superconductor (Li0.84Fe0.16)OHFeSe
• Magnetic ground state of FeSe
• Monolayer FeSe on SrTiO${}_3$
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• The Role of SrTiO3 Phonon Penetrating into thin FeSe Films in the Enhancement of Superconductivity
• Tuning phase transitions of FeSe thin flakes by field effect transistor with solid ion conductor as gate dielectric
• 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
• Scrutinizing the double superconducting gaps and strong coupling pairing in (Li1-xFexOH)FeSe
• Dynamic interfacial polaron enhanced superconductivity of FeSe/SrTiO3
• Preformed Cooper pairs in layered FeSe-based superconductors
• Experimental Demonstration of the Sign Reversal of the Order Parameter in (Li1-xFex)OHFe1-yZnySe
• Observation of high-Tc superconductivity in rectangular FeSe/STO(110) monolayer
• Reemergence of high-Tc superconductivity in the (Li1-xFex)OHFe1-ySe under high pressure
• High Tc via spin fluctuations from incipient bands: application to monolayers and intercalates of FeSe
• Nanoscale assembly of superconducting vortices with scanning tunnelling microscope tip
• Resilient nodeless $d$-wave superconductivity in monolayer FeSe
• Incoherent Cooper pairing and pseudogap behavior in single-layer FeSe/SrTiO${}_3$
• Superconductivity in FeSe thin films driven by the interplay between nematic fluctuations and spin-orbit coupling
• Surface electronic structure and evidence of plain s-wave superconductivity in (Li0.8Fe0.2)OHFeSe
• Synergetic Behavior in 2D Layered Material/Complex Oxide Heterostructures
• Superconductivity across Lifshitz transition and anomalous insulating state in surface K-dosed (Li0.8Fe0.2OH)FeSe
• Spectroscopic Evidence of Superconductivity Pairing at 83 K in Single-Layer FeSe/SrTiO3 Films
• 20 K superconductivity in heavily electron doped surface layer of FeSe bulk crystal
• High-Tc superconductivity up to 55 K under high pressure in the heavily electron doped Lix(NH3)yFe2Se2 single crystal
• Ultrafast Quasiparticle Dynamics and Electron-Phonon Coupling in (Li0.84Fe0.16)OHFe0.98Se
• Extreme anisotropy and anomalous transport properties of heavily electron doped Lix(NH3)yFe2Se2 single crystals
• Odd and even modes of neutron spin resonance in the bilayer iron-based superconductor CaKFe${}_4$As${}_4$
• Structure of spin excitations in heavily electron-doped Li0.8Fe0.2ODFeSe superconductors
• Proximity induced superconductivity within the insulating (Li${}_{0.84}$Fe${}_{0.16}$)OH layers in (Li${}_{0.84}$Fe${}_{0.16}$)OHFe${}_{0.98}$Se
• Topological Superconductivity in an s-wave Superconductor and Its Implication to Iron-based Superconductors
• A brief review on muSR studies of unconventional Fe and Cr-based superconductors
• Effects of magnetic dopants in (Li${}_{0.8}$M${}_{0.2}$OH)FeSe (M = Fe, Mn, Co): a density-functional theory study using band unfolding technique
• Electronic structure of FeSe monolayer superconductors
• Detection of bosonic mode as a signature of magnetic excitation in one unit cell FeSe on SrTiO3
• Lattice Dynamics of Ultrathin FeSe Films on SrTiO3
• Protonation-induced discrete superconducting phases in bulk FeSe single crystals
• Classification of Symmetry Derived Pairing at M Point in FeSe
• Heterostructural one-unit-cell FeSe/SrTiO3: from high-temperature superconductivity to topological states
• Spin resonance in the superconducting state of Li${}_{1-x}$Fe${}_x$ODFe${}_{1-y}$Se observed by neutron spectroscopy
• Nodal superconductivity in FeS: Evidence from quasiparticle heat transport
• Low-energy spin excitations in Li(0.8)Fe(0.2)ODFeSe superconductor studied with inelastic neutron scattering
• Magnetic fluctuations and spin-spirals in single-layer FeSe
• Electronic structure of FeSe monolayer superconductors: shallow bands and correlations
• Lattice distortion induced first and second order topological phase transition in rectangular high-T${}_{\mathrm{c}}$ superconducting monolayer
• Proposal for a bulk material based on a monolayer FeSe on SrTiO3 high-temperature superconductor
• Canted Antiferromagnetism in the Quasi-1D Iron Chalcogenide BaFe${}_2$Se${}_4$
• Electronic and phononic properties of a two dimensional electron gas coupled to dipolar phonons via small-momentum-transfer scattering
• Band structure and charge doping effects of potassium-adsorbed FeSe/SrTiO3 system
• Raman Study of Cooper Pairing Instabilities in (Li${}_{1-x}$Fe${}_x$)OHFeSe
• Synthesis, phase stability, structural and physical properties of 11-type iron chalcogenides
• Ab-initio Studies of (Li${}_{0.8}$Fe${}_{0.2}$)OHFeSe Superconductors: Revealing the Dual Roles of Fe${}_{0.2}$ in Structural Stability and Charge Transfer
• Effect of nonmagnetic impurities on $s_{\pm }$ superconductivity in the presence of incipient bands
• Sign reversal superconducting gaps revealed by phase referenced quasi-particle interference of impurity induced bound states in (Li${}_{1-x}$Fe${}_x$)OHFe${}_{1-y}$Zn${}_y$Se
• Charge order driven by multiple-Q spin fluctuations in heavily electron-doped iron selenide superconductors
• Quasi two-dimensional nature of high-Tc superconductivity in iron-based (Li,Fe)OHFeSe
• Soft phonons in the interface layer of the STO substrate can explain high temperature superconductivity in one unit cell FeSe
• Flatband-Induced Itinerant Ferromagnetism in RbCo${}_2$Se${}_2$
• Orbital superconductivity, defects and pinned nematic fluctuations in the doped iron chalcogenide FeSe${}_{0.45}$Te${}_{0.55}$
• Revealing the Microscopic Mechanism of Elementary Vortex Pinning in Superconductors
• Electronic phase separation in iron selenide (Li, Fe)OHFeSe superconductor system
• Probing the superconducting gap structure of (Li${}_{1-x}$Fe${}_x$)OHFeSe
• Possible spin excitation structure in monolayer FeSe grown on SrTiO${}_3$
• Hydrogen in superconductors
• Spin Resonances in Iron-Selenide High-Tc Superconductors by Proximity to Hidden Spin Density Wave
• Checkerboard order state in superconducting FeSe/SrTiO3(001) monolayer
• Enhanced superconductivity and anisotropy of FeTe0.6Se0.4 single crystals with Li-NH3 intercalation
• Possible pairing symmetry in the FeSe-based superconductors determined by quasiparticle interference
• Quasiparticle Interference and Symmetry of Superconducting Order Parameter in Strongly Electron-Doped Iron-based Superconductors
• Phase shift and magnetic anisotropy induced field splitting of impurity states in (Li1-xFex)OHFeSe superconductor
• Fermi surface pockets in electron-doped iron superconductor by Lifshitz transition
• Superconductivity by Hidden Spin Fluctuations in Electron-Doped Iron Selenide
• Doping Mn into (Li1-xFex)OHFe1-ySe superconducting crystals via ion-exchange and ion-release/introduction syntheses
• Finite temperature effects on Majorana bound states in chiral $p$-wave superconductors
• Coexistence of localized and itinerant magnetism in intercalated iron-selenide (Li,Fe)OHFeSe
• Dispersionless orbital excitations in (Li,Fe)OHFeSe superconductors
• High-$T_c$ Iron-phosphide Superconductivity Enhanced by Reemergent Antiferromagnetic Spin Fluctuations in (Sr${}_4$Sc${}_2$O${}_6$)Fe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ probed by NMR
• Isotropic Cooper Pairs with Emergent Sign Changes in Single-Layer Iron Superconductor
• Unconventional Multi-gap Superconductivity and Antiferromagnetic Spin Fluctuations in New Iron-arsenide LaFe2As2 in Heavily Electron-doped Regime
• Identifying the dominant pairing interaction in high-$T_c$ FeSe superconductors through Leggett modes
• Neutron Spin Resonance Near a Lifshitz Transition in Overdoped Ba${}_{0.4}$K${}_{0.6}$Fe${}_2$As${}_2$
• In-situ electrical and thermal transport properties of FeySe1-xTex films with ionic liquid gating
• Modulation doping of the FeSe monolayer on SrTiO${}_3$
• The phonon mechanism explanation of the superconductivity dichotomy between FeSe and FeS monolayers on STO and other substrates
• $\mathrm{L}{\mathrm{i}}_{\mathrm{x}}({\mathrm{C}}_5{\mathrm{H}}_5\mathrm{N}{)}_{\mathrm{y}}\mathrm{F}{\mathrm{e}}_{2-\mathrm{z}}\mathrm{S}{\mathrm{e}}_2$: a defect resilient expanded-lattice high-temperature superconductor
• Importance of Fermi surface and magnetic interactions for the superconducting dome in electron doped FeSe intercalates
• Crystal structures and the sign reversal Hall resistivity in iron-based superconductors Lix(C3H10N2)0.32FeSe (0.15<x<0.4)
• Observation of two distinct superconducting domes under pressure in tetragonal FeS
• Effect of the additional Se layer on the electronic structure of iron-based superconductor FeSe/SrTiO${}_3$
• Diversified Ruderman-Kittel-Kasuya-Yosida Interactions in a Nonsymmorphic Crystal
• In-gap bound states induced by a single nonmagnetic impurity in sign-preserving s-wave superconductors with incipient bands
• Representation-protected topology of spin-singlet $s$-wave superconductors
• Optical study of the antiferromagnetic ordered state in electron-overdoped Ca0.77Nd0.23FeAs2
• Nodeless multigap superconductivity in organic-ion-intercalated (tetrabutyl~ammonium)${}_{0.3}$FeSe
• Understanding and enhancing superconductivity in FeSe/STO by quantum size effects
• Spin correlations in the parent phase of Li${}_{1-x}$Fe${}_x$ODFeSe
• Particle-Hole Transformation in Strongly-Doped Iron-Based Superconductors
• LaO as a candidate substrate for realizing superconductivity in FeSe epitaxial film
• Sublattice Dichotomy in Monolayer FeSe Superconductor
• Polarized neutron scattering studies of magnetic excitations in iron-selenide superconductor (Li${}_{0.8}$Fe${}_{0.2}$)ODFeSe ($T_c$ = 41 K)
• Origin of the Electronic Structure in Single-Layer FeSe/SrTiO3 Films
• Band structure of organic-ion-intercalated (EMIM)${}_x$FeSe superconductor
• Robustness of superconducting properties to transition metal substitution and impurity phases in Fe1-xVxSe
• Electronic and Superconducting Properties of Some FeSe-based Single Crystals and Films Grown Hydrothermally