Electronic Origin of High Temperature Superconductivity in Single-Layer FeSe Superconductor

Abstract

The latest discovery of high temperature superconductivity signature in single-layer FeSe is significant because it is possible to break the superconducting critical temperature ceiling (maximum Tc~55 K) that has been stagnant since the discovery of Fe-based superconductivity in 2008. It also blows the superconductivity community by surprise because such a high Tc is unexpected in FeSe system with the bulk FeSe exhibiting a Tc at only 8 K at ambient pressure which can be enhanced to 38 K under high pressure. The Tc is still unusually high even considering the newly-discovered intercalated FeSe system A_xFe_{2-y}Se_2 (A=K, Cs, Rb and Tl) with a Tc at 32 K at ambient pressure and possible Tc near 48 K under high pressure. Particularly interesting is that such a high temperature superconductivity occurs in a single-layer FeSe system that is considered as a key building block of the Fe-based superconductors. Understanding the origin of high temperature superconductivity in such a strictly two-dimensional FeSe system is crucial to understanding the superconductivity mechanism in Fe-based superconductors in particular, and providing key insights on how to achieve high temperature superconductivity in general. Here we report distinct electronic structure associated with the single-layer FeSe superconductor. Its Fermi surface topology is different from other Fe-based superconductors; it consists only of electron pockets near the zone corner without indication of any Fermi surface around the zone center. Our observation of large and nearly isotropic superconducting gap in this strictly two-dimensional system rules out existence of node in the superconducting gap. These results have provided an unambiguous case that such a unique electronic structure is favorable for realizing high temperature superconductivity.

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Cited by in corpus (286)

• Phase Diagram and High Temperature Superconductivity at 65 K in Tuning Carrier Concentration of Single-Layer FeSe Films
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• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Enhanced superconductivity in atomically thin TaS2
• Structure determination and coexistence of superconductivity and antiferromagnetic order in (Li0.8Fe0.2)OHFeSe
• The Unexpected Properties of Alkali Metal Iron Selenide Superconductors
• Exploration of new superconductors and functional materials and fabrication of superconducting tapes and wires of iron pnictides
• Direct observation of high temperature superconductivity in one-unit-cell FeSe films
• Evolution of high-temperature superconductivity from low-Tc phase tuned by carrier concentration in FeSe thin flakes
• Electric-field-induced superconductivity in electrochemically-etched ultrathin FeSe films on SrTiO3 and MgO
• Critical role of substrate in the high temperature superconductivity of single layer FeSe on Nb:BaTiO${}_3$
• Iron based high transition temperature superconductors
• Common Electronic Origin of Superconductivity in (Li,Fe)OHFeSe Bulk Superconductor and Single-Layer FeSe/SrTiO3 Films
• Observation of universal strong orbital-dependent correlation effects in iron chalcogenides
• Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3(110)
• Unusual band renormalization in the simplest iron based superconductor
• Monolayer FeSe on SrTiO${}_3$
• Anomalous correlation effects and unique phase diagram of electron doped FeSe revealed by angle resolved photoemission spectroscopy
• Plain s-wave superconductivity in single-layer FeSe on SrTiO3 probed by scanning tunneling microscopy
• Two-dimensional superconductivity at the interface of a Bi2Te3/FeTe heterostructure
• Space group symmetry, spin-orbit coupling and the low energy effective Hamiltonian for iron based superconductors
• Orbital selective pairing and gap structures of iron-based superconductors
• Enhanced superconductivity and evidence for novel pairing in single-layer FeSe on SrTiO3 thin film under large tensile strain
• (Li0.84Fe0.16)OHFe0.98Se superconductor: Ion-exchange synthesis of large single crystal and highly two-dimensional electron properties
• Electronic Structure and Superconductivity of FeSe-Related Superconductors
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Surface electronic structure and isotropic superconducting gap in (Li${}_{0.8}$Fe${}_{0.2}$)OHFeSe
• Angle-resolved photoemission spectroscopy
• Two-dimensional Superconductors with Atomic-scale Thicknesses
• Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates
• High temperature superconducting FeSe films on SrTiO3 substrates
• Observation of Double-Dome Superconductivity in Potassium-Doped FeSe Thin Films
• Superconducting gap anisotropy in monolayer FeSe thin film
• High-temperature superconductivity in single-unit-cell FeSe films on anatase TiO2(001)
• Ultrafast Dynamics Evidence of High Temperature Superconductivity in Single Unit Cell FeSe on SrTiO3
• Origin of charge transfer and enhanced electron-phonon coupling in single unit-cell FeSe films on SrTiO3
• Onset of the Meissner effect at 65 K in FeSe thin film grown on Nb doped SrTiO3 substrate
• What makes the Tc of monolayer FeSe on SrTiO3 so high: a sign-problem-free quantum Monte Carlo study
• 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
• Large electron-phonon interactions from FeSe phonons in a monolayer
• Berry connection polarizability tensor and third-order Hall effect
• Interface enhanced electron-phonon coupling and high temperature superconductivity in potassium-coated ultra-thin FeSe films on SrTiO3
• Enhancement of the superconducting gap by nesting in CaKFe4As4 - a new high temperature superconductor
• Fe-vacancy order and superconductivity in PbO-type tetragonal β-Fe1-xSe
• Enhanced Superconductivity in TiO Epitaxial Thin Films
• Dynamic interfacial polaron enhanced superconductivity of FeSe/SrTiO3
• Electronic Evidence of an Insulator-Superconductor Transition in Single-Layer FeSe/SrTiO3 Films
• FeTe${}_{1-x}$Se${}_x$ monolayer films: towards the realization of high-temperature connate topological superconductivity
• Topological quantum states of matter in iron-based superconductors: From concepts to material realization
• Topological Phases in the Single-Layer FeSe
• Highly anisotropic and two-fold symmetric superconducting gap in nematically ordered FeSe${}_{0.93}$S${}_{0.07}$
• Antiferromagnetic ground state with pair-checkboard order in FeSe
• High-temperature superconductivity in one-unit-cell FeSe films
• A comprehensive review on topological superconducting materials and interfaces
• Dichotomy of Electronic Structure and Superconductivity between Single-Layer and Double-Layer FeSe/SrTiO3 Films
• Preformed Cooper pairs in layered FeSe-based superconductors
• Observation of high-Tc superconductivity in rectangular FeSe/STO(110) monolayer
• Orbital-selective superconductivity, gap anisotropy and spin resonance excitations in a multiorbital t-J1-J2 model for iron pnictides
• Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe/SrTiO${}_3$
• High Tc via spin fluctuations from incipient bands: application to monolayers and intercalates of FeSe
• Atomically Resolved FeSe/SrTiO3(001) Interface Structure by Scanning Transmission Electron Microscopy
• Interface high-temperature superconductivity
• High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser
• Enhancement of Tc by point-like disorder and anisotropic gap in FeSe
• The interfacial effects on the spin density wave in FeSe/SrTiO3 thin film
• Effects of charge doping and constrained magnetization on the electronic structure of an FeSe monolayer
• When Superconductivity Crosses Over: From BCS to BEC
• 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
• Fermiology, Orbital Order, Orbital Fluctuation and Cooper Pairing in Iron-based Superconductors
• Superconductivity dichotomy in K-coated single and double unit cell FeSe films on SrTiO3
• 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
• Synergetic Behavior in 2D Layered Material/Complex Oxide Heterostructures
• Observation of Dirac Cone Band Dispersion in FeSe Thin Films by Photoemission Spectroscopy
• Thickness dependence of superconductivity and superconductor-insulator transition in ultrathin FeSe films on SrTiO3(001) substrate
• 20 K superconductivity in heavily electron doped surface layer of FeSe bulk crystal
• Superconductor-insulator transitions: Phase diagram and magnetoresistance
• Oxygen Vacancy Induced Flat Phonon Mode at FeSe /SrTiO3 interface
• CaFeAs${}_2$: a Staggered Intercalation of Quantum Spin Hall and High Temperature Superconductivity
• Gated Tuned Superconductivity and Phonon Softening in Mono- and Bilayer MoS${}_2$
• The role of double TiO2 layers at the interface of FeSe/SrTiO3 superconductors
• Superconducting state in Fe-based materials and spin-fluctuation theory of pairing
• Ab initio Study of Cross-Interface Electron-Phonon Couplings in FeSe Thin Films on SrTiO${}_3$ and BaTiO${}_3$
• Observation of topological transition in high-T${}_c$ superconductor FeTe${}_{1-x}$Se${}_x$/SrTiO${}_3$(001) monolayers
• Impurities in multiband superconductors
• Restoring Pristine Bi2Se3 Surface with an Effective Se Decapping Process
• Nodeless high-T${}_c$ superconductivity in highly-overdoped monolayer CuO${}_2$
• Odd and even modes of neutron spin resonance in the bilayer iron-based superconductor CaKFe${}_4$As${}_4$
• Metamorphoses of electronic structure of FeSe-based superconductors (Review article)
• Magnetic properties and pairing tendencies of the iron-based superconducting ladder BaFe${}_2$S${}_3$: combined ab initio and density matrix renormalization group study
• Do Se vacancies electron dope monolayer FeSe?
• Polarity induced electronic and atomic reconstruction at NdNiO2/SrTiO3 interfaces
• Effective pairing interaction in a system with an incipient band
• Multiband full-bandwidth anisotropic Eliashberg theory of interfacial electron-phonon coupling and high-T${}_c$ superconductivity in FeSe/SrTiO${}_3$
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Selection rules for Cooper pairing in two-dimensional interfaces and sheets
• Superconductivity without inversion and time-reversal symmetries
• Imaging the Electron-Boson Coupling in Superconducting FeSe
• Aspects of electron-phonon interactions with strong forward scattering in FeSe Thin Films on SrTiO${}_3$ substrates
• Superconductivity and Nematic Fluctuations in a model of FeSe monolayers: A Determinant Quantum Monte Carlo Study
• Entangled Orbital Triplet Pairs in Iron-Based Superconductors
• Scanning tunneling spectroscopy of layers of superconducting 2H-TaSe${}_{\text{2}}$: Evidence for a zero bias anomaly in single layers
• A general group theoretical method to unfold band structures and its application
• Mapping the Electronic Structure of Each Ingredient Oxide Layer of High-$T_{\text{c}}$ Cuprate Superconductor Bi2Sr2CaCu2O8+δ
• Sauter-Schwinger effect in a Bardeen-Cooper-Schrieffer superconductor
• Scanning tunneling spectroscopy of superconductivity on surfaces of LiTi2O4(111) thin films
• Observation of discrete conventional Caroli-de Gennes-Matricon states in the vortex core of single-layer FeSe/SrTiO3
• On peculiarities of superconductivity in the single-layer FeSe/SrTiO3 interfa
• Topological Superconductivity in an s-wave Superconductor and Its Implication to Iron-based Superconductors
• Strong and nonmonotonic temperature dependence of Hall coefficient in superconducting K${}_x$Fe${}_{2-y}$Se${}_2$ single crystals
• Topological superconducting states in monolayer FeSe/SrTiO${}_3$
• Electronic structure of FeSe monolayer superconductors
• Zero-bias conductance peak in detached flakes of superconducting 2H-TaS${}_2$ probed by scanning tunneling spectroscopy
• 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
• Mechanism, time-reversal symmetry and topology of superconductivity in noncentrosymmetric systems
• Evidence for d-wave superconductivity in single layer FeSe/SrTiO3 probed by quasiparticle scattering off step edges
• The magnetic moment enigma in Fe-based high temperature superconductors
• Discovery of unconventional charge density wave at the surface of K0.9Mo6O17
• Pairing Tendencies in a Two-orbital Hubbard Model in One Dimension
• 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
• Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering
• Superconducting mechanism for the cuprate Ba${}_2$CuO${}_{3+\delta }$ based on a multiorbital Lieb lattice model
• What Tc Tells
• Protonation-induced discrete superconducting phases in bulk FeSe single crystals
• Strongly enhanced superconductivity due to finite energy spin fluctuations induced by an incipient band : a FLEX study on the bilayer Hubbard model with vertical and diagonal interlayer hoppings
• Argument on superconductivity pairing mechanism from cobalt impurity doping in FeSe: spin ($s_{\pm }$) or orbital ($s_{++}$) fluctuation
• Understanding doping, vacancy, lattice stability and superconductivity in KxFe2-ySe2
• Eliashberg theory for spin-fluctuations mediated superconductivity -- Application to bulk and monolayer FeSe
• Heterostructural one-unit-cell FeSe/SrTiO3: from high-temperature superconductivity to topological states
• Edge states at nematic domain walls in FeSe films
• The influence of spin-phonon coupling on antiferromagnetic spin fluctuations in FeSe under pressure: the First-principles calculations with van der Waals corrections
• Density matrix renormalization group study of a three-orbital Hubbard model with spin-orbit coupling in one dimension
• Thickness-Dependent Coherent Phonon Frequency in Ultrathin FeSe/SrTiO${}_3$ Films
• Magnetic fluctuations and spin-spirals in single-layer FeSe
• Superconductivity and Dirac Fermions in 112-phase Pnictides
• Absence of superconductivity in ultra-thin layers of FeSe synthesized on a topological insulator
• Quantum Unfolding: A program for unfolding electronic energy bands of materials
• First-principles study of magnetic frustration in FeSe epitaxial films on SrTiO${}_3$
• Angle-resolved photoemission spectroscopy of the low-energy electronic structure of superconducting Pr${}_2$CuO${}_4$ driven by oxygen non-stoichiometry
• Interfacial Electron-Phonon Coupling Constants Extracted from Intrinsic Replica Bands in Monolayer FeSe/SrTiO${}_3$
• Superconducting monolayer deposited on substrate: effects of the spin-orbit coupling induced by proximity effects
• Magnetic phase separation and superfluid density measurements in alkali metal-organic solvent intercalated iron selenide superconductor Lix(C5H5N)yFe2-zSe2
• Many-variable variational Monte-Carlo study of superconductivity in two-band Hubbard models with an incipient band
• Spin Fluctuation Induced Linear Magnetoresistance in Ultrathin Superconducting FeSe Films
• Self-consistent temperature dependence of quasiparticle bands in monolayer FeSe on SrTiO${}_3$
• Electronic structure of FeSe monolayer superconductors: shallow bands and correlations
• Unconventional pairing in single FeSe layers
• Observation of an electron band above the Fermi level in FeTe${}_{0.55}$Se${}_{0.45}$ from \emph{in-situ} surface doping
• 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
• Bounds on Nanoscale Nematicity in Single-Layer FeSe/SrTiO${}_3$
• In-plane optical spectroscopy study on FeSe epitaxial thin film grown on SrTiO${}_3$ substrate
• Robust superconductivity and transport properties in (Li1-xFex)OHFeSe single crystals
• Observation of highly anisotropic bulk dispersion and spin-polarized topological surface states in CoTe2
• Electronic and phononic properties of a two dimensional electron gas coupled to dipolar phonons via small-momentum-transfer scattering
• Direct evidence of superconductivity and determination of the superfluid density in buried ultrathin FeSe grown on SrTiO${}_3$
• Intrinsic interfacial van der Waals monolayers and their effect on the high-temperature superconductor FeSe/SrTiO${}_3$
• Phonon linewidth due to electron-phonon interactions with strong forward scattering in FeSe thin films on oxide substrates
• Band structure and charge doping effects of potassium-adsorbed FeSe/SrTiO3 system
• Resonant pair-exchange scattering and BCS-BEC crossover in a system composed of dispersive and heavy incipient bands: a Feshbach analogy
• Tunable Fe-vacancy disorder-order transition in FeSe thin films
• Fermi-surface topological phase transition and horizontal order-parameter nodes in CaFe${}_2$As${}_2$ under pressure
• An Integrated Quantum Material Testbed with Multi-Resolution Photoemission Spectroscopy
• Chemical composition control at the substrate interface as the key for FeSe thin film growth
• Superconducting FeSe monolayer with milli-electron volt Fermi energy
• Basic electronic properties of iron selenide under variation of structural parameters
• Multichannel superconductivity of monolayer FeSe on SrTiO${}_3$: Interplay of spin fluctuations and electron-phonon interaction
• Strain effects in monolayer Iron-Chalcogenide superconductors
• Synthesis, phase stability, structural and physical properties of 11-type iron chalcogenides
• Interplay between band structure and Hund's correlation to increase T${}_c$ in FeSe
• Soft phonons in the interface layer of the STO substrate can explain high temperature superconductivity in one unit cell FeSe
• Effects of interface oxygen vacancies on electronic bands of FeSe/SrTiO3(001)
• Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study
• Superconductivity in 2D electron gas induced by high energy optical phonon mode and large polarization of the STO substrate
• Interface superconductivity in FeSe thin films on SrTiO${}_3$grown by the PLD technique
• Flatband-Induced Itinerant Ferromagnetism in RbCo${}_2$Se${}_2$
• Is BaCr${}_2$As${}_2$ symmetrical to BaFe${}_2$As${}_2$ with respect to half $3d$ shell filling?
• Direct probing of a large spin-orbit coupling in the FeSe superconducting monolayer on STO: Evidence for nontrivial topological states
• Enhanced superconductivity in FeSe/SrTiO${}_3$ from the combination of forward scattering phonons and spin fluctuations
• Signatures of pairing in the magnetic excitation spectrum of strongly correlated ladders
• Electronic structure in one-Fe Brillouin zone of iron-pnictide superconductor CsFe${}_2$As${}_2$
• TAO pairing: a fully gapped pairing scenario for the Iron-Based Superconductors
• Superconducting transition of FeSe/SrTiO3 induced by adsorption of semiconducting organic molecules
• Shape resonances and shell effects in thin-film multiband superconductors
• Coexistence of magnetism and superconductivity in separate layers of the iron-based superconductor Li_{1-x}Fe_{x}(OH)Fe_{1-y}Se
• Doubling of the superconducting transition temperature in ultra-clean wafer-scale aluminum nanofilms
• Superconductivity enhanced by pair fluctuations between wide and narrow bands
• Positive and negative chemical pressure effects investigated in electron-doped FeSe films with an electric-double-layer structure
• Electronic properties of the FeSe/STO interface from first-principle calculations
• Observation of a Hidden Hole-Like Band Approaching the Fermi Level in K-Doped Iron Selenide Superconductor
• Structure of the pairing gap from orbital nematic fluctuations
• Inverse proximity effect in $s$-wave and $d$-wave superconductors coupled to topological insulators
• Electronic structure and nematic phase transition in superconducting multi-layer FeSe films grown by pulsed laser deposition method
• Identification of a Large Amount of Excess Fe in Superconducting Single-Layer FeSe/SrTiO3 Films
• Magic Doping and Robust Superconductivity in Monolayer FeSe on Titanates
• Phase competition in a one-dimensional three-orbital Hubbard-Holstein model
• Thermodynamic electric quadrupole moments of nematic phases from first-principles calculation
• Theoretical prediction of superconductivity in monolayer h-BN doped with alkaline-earth metals (Ca, Sr, Ba)
• Size effects in superconducting thin films coupled to a substrate
• Hidden sign-changing $s$-wave superconductivity in monolayer FeSe
• Evidence for an Additional Symmetry Breaking from Direct Observation of Band Splitting in the Nematic State of FeSe Superconductor
• Nodal topology in $d$-wave superconducting monolayer FeSe
• Possible spin excitation structure in monolayer FeSe grown on SrTiO${}_3$
• Microstructural control of the transport properties of $\beta$-FeSe films grown by sputtering
• Emergent Nesting of the Fermi Surface from Local-Moment Description of Iron-Pnictide High-Tc Superconductors
• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Details of the disorder-induced transition between $s_{\pm }$ and $s_{++}$ states in two-band model for Fe-based superconductors
• Fermi surface pockets in electron-doped iron superconductor by Lifshitz transition
• First-principles study of FeSe epitaxial films on SrTiO3
• Possible pairing symmetry in the FeSe-based superconductors determined by quasiparticle interference
• Checkerboard order state in superconducting FeSe/SrTiO3(001) monolayer
• Superconductivity by Hidden Spin Fluctuations in Electron-Doped Iron Selenide
• Model Hamiltonian for Altermagnetic Topological Insulators
• Superconductivity of the FeSe/SrTiO3 Interface in the View of BCS-BEC Crossover
• Pairing enhanced by local orbital fluctuations in a model for monolayer FeSe
• Strong enhancement of magnetic order from bulk to stretched monolayer FeSe as Hund's metals
• Insulating Parent Phase and Distinct Doping Evolution to Superconductivity in Single-Layer FeSe/SrTiO3 Films
• High-throughput investigation of tunable superconductivity in FeSe films
• Isotropic Cooper Pairs with Emergent Sign Changes in Single-Layer Iron Superconductor
• Strong Landau-quantization effects in high-magnetic-field superconductivity of a two-dimensional multiple-band metal near the Lifshitz transition
• Anisotropy of upper critical fields and interface superconductivity in FeSe/SrTiO3 grown by PLD
• Intertwined charge, spin, and pairing orders in doped iron ladders
• Ubiquitous stripe phase and enhanced electron pairing in interfacial high-Tc superconductor FeSe/BaTiO${}_3$
• The electronic structure and magnetic phase transition of hexagonal FeSe thin films studied by photoemission spectroscopy
• 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${}_2$
• The effects of Coulomb interactions on the superconducting gaps in iron-based superconductors
• Novel Block Excitonic Condensate at $n=3.5$ in a Spin-Orbit Coupled $t_{2g}$ Multiorbital Hubbard Model
• Molecular Beam Epitaxy Growth of Tetragonal FeS Film on SrTiO3(001) Substrate
• Imaging Se diffusion across the FeSe/SrTiO${}_3$ interface
• Cu doping effects on the electronic structure of Fe1-xCuxSe
• Anisotropic gap structure and sign reversal symmetry in monolayer Fe(Se,Te)
• $\mathrm{L}{\mathrm{i}}_{\mathrm{x}}({\mathrm{C}}_5{\mathrm{H}}_5\mathrm{N}{)}_{\mathrm{y}}\mathrm{F}{\mathrm{e}}_{2-\mathrm{z}}\mathrm{S}{\mathrm{e}}_2$: a defect resilient expanded-lattice high-temperature superconductor
• Atomic bonding and electrical characteristics of two-dimensional graphene/boron nitride van der Waals heterostuctures with manufactured defects via binding energy and bond-charge model
• Electrical switching effect of a single-unit-cell CrO2 layer on rutile TiO2 surface
• Resistivity in Co-doped Ba-122: comparison of thin films and single crystals
• The phonon mechanism explanation of the superconductivity dichotomy between FeSe and FeS monolayers on STO and other substrates
• Resonance states near a quantum magnetic impurity in single-layer FeSe superconductors with $d$-wave symmetry
• Direct evidence of a charge depletion region at the interface of Van der Waals monolayers and dielectric oxides: The case of superconducting FeSe/STO
• Effect of the additional Se layer on the electronic structure of iron-based superconductor FeSe/SrTiO${}_3$
• Staggered FeSe Monolayer on SrTiO${}_3$ (110) surface
• Doping asymmetry and layer-selective metal-insulator transition in trilayer K${}_{3+x}$C${}_{60}$
• Observation of two distinct superconducting domes under pressure in tetragonal FeS
• Fluctuating Cooper pairs in FeSe at temperatures exceeding double Tc
• Tuning the magnetism of the top-layer FeAs on BaFe${}_2$As${}_2$(001): First-principles study
• Orbital-resolved vortex core states in FeSe Superconductors: calculation based on a three-orbital model
• Two new parent compounds for FeSe-based superconducting phases
• Tuning monolayer superconductivity in twisted NbSe${}_2$ graphene heterostructures
• Temperature dependence and limiting mechanisms of the upper critical field of FeSe thin films
• Representation-protected topology of spin-singlet $s$-wave superconductors
• Capping layer influence and isotropic in-plane upper critical field of the superconductivity at the FeSe/SrTiO3 interface
• In-gap bound states induced by a single nonmagnetic impurity in sign-preserving s-wave superconductors with incipient bands
• Coupled multiple-mode theory for $s_{\pm }$ pairing mechanism in iron based superconductors
• Electronically driven nematicity in FeSe Films on SrTiO3
• Nodeless multigap superconductivity in organic-ion-intercalated (tetrabutyl~ammonium)${}_{0.3}$FeSe
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• Study on fluctuations of interface-enhanced superconductivity in ultrathin FeSe/SrTiO3 by the Nernst effect
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• LaO as a candidate substrate for realizing superconductivity in FeSe epitaxial film
• Topological phases in twisted Rashba superconductors
• Sublattice Dichotomy in Monolayer FeSe Superconductor
• Inferior interfacial superconductivity in 1 UC FeSe/SrVO${}_3$/SrTiO${}_3$ with screened interfacial electron-phonon coupling
• Superconductivity of 30.4 K and its Reemergence under Pressure in Fe1.11Se Synthesized via Ion-exchange and De-intercalation Reaction
• Electronic Structure of ${\mathrm{Sr}}_{1-y}{\mathrm{Ca}}_y\mathrm{F}{\mathrm{e}}_2({\mathrm{As}}_{1-x}{\mathrm{P}}_x{)}_2$ ($x$ = 0.25, $y$ = 0.08) Revealed by Angle-Resolved Photoemission Spectroscopy
• Superconductor-polariton non-dissipative drag in optical microcavity
• Analyzing scanning tunneling spectroscopy for Fe-based superconductor Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ and extracting $s$-wave density of states
• Origin of the Electronic Structure in Single-Layer FeSe/SrTiO3 Films
• Fabrication of oxide/FeSe multilayer films using the PLD technique
• Hidden Ladder in SrMoO${}_3$/SrTiO${}_3$ Superlattices: Experiments and Theoretical Calculations
• Robustness of superconducting properties to transition metal substitution and impurity phases in Fe1-xVxSe
• What controls the superconducting dome of electron-doped FeSe?
• Orbital effect on the in-plane critical field in free-standing superconducting nanofilms
• BCS-BEC crossover driven by small Fermi pockets of a high-Tc cuprate superconductor
• Coexistence of d-Wave Altermagnetism and Topological States in Janus FeSeX (X = S, Te) Monolayers
• Iron-Based Superconductors as Parity Odd Superconductors
• Self-consistent solution for the magnetic exchange interaction mediated by a superconductor
• Plaquette-centered rotation symmetry and octet-nodal superconductivity in ${\text{KFe}}_2{\text{As}}_2$
• Temperature evolution of the Fermi surface of the FeSe monolayer on SrTiO${}_3$
• Fe-vacancy ordered Fe4Se5: The insulating parent phase of FeSe superconductor