Pairing symmetry and topological surface state in iron-chalcogenide superconductors

Abstract

The symmetries of superconducting gap functions remain an important question of iron-based superconductivity. Motivated by the recent angle-resolved photoemission spectroscopic measurements on iron-chalcogenide superconductors, we investigate the influence of pairing symmetries on the topological surface state. If the surface Dirac cone becomes gapped in the superconducting phase, it implies magnetization induced from time-reversal symmetry breaking pairing via spin-orbit coupling. Based on the crystalline symmetry constraints on the Ginzburg-Landau free energy, the gap function symmetries are among the possibilities of $A_{1g(u)}\pm i{A}_{2g(u)}$, $B_{1g(u)}\pm i{B}_{2g(u)}$, or, $E_{g(u)}\pm i{E}_{g(u)}$. This time-reversal symmetry breaking effect can exist in the normal state very close to $T_c$ with the relative phase between two gap functions locked at $\pm \frac{\pi }{2}$. The coupling between magnetization and superconducting gap functions is calculated based on a three-orbital model for the band structure of iron-chalcogenides. This study provides the connection between the gap function symmetries and topological properties of the surface state.

arXiv comment11 pages, 8 figures. Comments are welcome!

References in corpus (75)

• Topological Insulators
• Topological insulators and superconductors
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Classification of topological quantum matter with symmetries
• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Colloquium: Topological Band Theory
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• The superconductivity at 18 K in LiFeAs system
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Evidence for Majorana bound state in an iron-based superconductor
• Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
• Observation of topological superconductivity on the surface of an iron-based superconductor
• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide
• Observation of Majorana fermions with spin selective Andreev reflection in the vortex of topological superconductor
• First-order magnetic and structural phase transitions in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$
• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• High Temperature Superconductivity in Iron Pnictides and Chalcogenides
• Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides
• Discovery of Orbital-Selective Cooper Pairing in FeSe
• Superconductivity without magnetism in LiFeAs
• Topological nature of FeSe${}_{0.5}$Te${}_{0.5}$ superconductor
• Topological superconductivity on the surface of Fe-based superconductors
• Observation of a Robust Zero-energy Bound State in Iron-based Superconductor Fe(Te,Se)
• Iron based high transition temperature superconductors
• Three-band superconductivity and the order parameter that breaks time-reversal symmetry
• Robust and clean Majorana zero mode in the vortex core of high-temperature superconductor (Li0.84Fe0.16)OHFeSe
• Unconventional superconductivity and antiferromagnetic quantum critical behavior in the isovalent-doped BaFe2(As1-xPx)2
• Three orbital model for the iron-based superconductors
• Temperature-doping phase diagrams for Ba(Fe1-xTMx)2As2(TM=Ni, Cu, Cu / Co) single crystals
• Electronic properties of single-crystalline Fe${}_{1.05}$Te and Fe${}_{1.03}$Se${}_{0.30}$Te${}_{0.70}$
• Pairing State with a time-reversal symmetry breaking in FeAs based superconductors
• NMR relaxation rate in superconducting pnictides: extended $s_{\pm }$ scenario
• s+is State with Broken Time Reversal Symmetry in Fe-Based Superconductors
• Selective Equal-Spin Andreev Reflections Induced by Majorana Fermions
• Topological Characters in Fe(Te${}_{1-x}$Se${}_x$) thin films
• Superfluid density of the $\pm$s-wave state for the iron-based superconductors
• Resonant impurity scattering in the $\pm$s-gap state of the Fe-based superconductors
• Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe0.55Se0.45
• Inter-pocket pairing and gap symmetry in Fe-based superconductors with only electron pockets
• Nematicity as a probe of superconducting pairing in iron-based superconductors
• Upper critical field, lower critical field and critical current density of FeTe0.60Se0.40 single crystal
• Mechanism for a Pairing State with Time-Reversal Symmetry Breaking in Iron-Based Superconductors
• Temperature dependence of lower critical field Hc1(T) shows nodeless superconductivity in FeSe
• Imaging Orbital-selective Quasiparticles in the Hund's Metal State of FeSe
• Theory for Superconductivity in Iron Pnictides at Large Coulomb U Limit
• Orbital selective pairing and superconductivity in iron selenides
• Orbital selectivity and emergent superconducting state from quasi-degenerate $s-$ and $d-$wave pairing channels in iron-based superconductors
• Leggett modes in iron-based superconductors as a probe of Time Reversal Symmetry Breaking
• Evidence for time-reversal symmetry breaking of the superconducting state near twin-boundary interfaces in FeSe
• Superconductivity from repulsion in LiFeAs: novel s-wave symmetry and potential time-reversal symmetry breaking
• Spin-Orbit Interactions and the Nematicity Observed in the Fe-Based Superconductors
• Theory for Spin Selective Andreev Reflection in Vortex Core of Topological Superconductor: Majorana Zero Modes on Spherical Surface and Application to Spin Polarized Scanning Tunneling Microscope Probe
• Mixed triplet and singlet pairing in multicomponent ultracold fermion systems with dipolar interactions
• A balancing act: Evidence for a strong subdominant d-wave pairing channel in $\mathrm{B}{\mathrm{a}}_{0.6}{\mathrm{K}}_{0.4}\mathrm{F}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_2$
• Orbital-selective superconductivity in the nematic phase of FeSe
• Collective $d-$wave Excitonic Modes in the Fe-Superconductors
• Time-reversal and rotation symmetry breaking superconductivity in Dirac materials
• Time-reversal symmetry-breaking nematic superconductivity in FeSe
• Loop currents and anomalous Hall effect from time-reversal symmetry-breaking superconductivity on the honeycomb lattice
• Meissner phases in spin-triplet ferromagnetic superconductors
• On the interplay of paramagnetism and topology in the Fe-based High Tc Superconductors
• Topological Crystalline Superconductivity in Dirac Semimetal Phase of Iron-based Superconductors
• Theory of tunnelling into a multi-band superconductor: decoherence and interference
• Coexistence of superconductivity and short-range double-stripe spin correlations in Te-vapor annealed FeTe${}_{1-x}$Se${}_x$ with $x\le 0.2$
• The Coulomb problem in iron based superconductors
• Nodal topology in $d$-wave superconducting monolayer FeSe
• Se content $x$ dependence of electron correlation strength in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Cooper Pairing in Insulating Valence Band in Fe-Based Superconductors

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• Revealing the Origin of Time-reversal Symmetry Breaking in Fe-chalcogenide Superconductor FeTe1-xSex
• Origin of Topological Surface Superconductivity in FeSe${}_{0.45}$Te${}_{0.55}$
• Identifying Topological Superconductivity in 2D Transition-Metal Dichalcogenides
• High-order Time-Reversal Symmetry Breaking Normal State
• Spontaneous magnetization in unitary superconductors with time reversal symmetry breaking
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