$S_4$ Symmetric Microscopic Model for Iron-Based Superconductors

Abstract

Although iron-based superconductors are multi-orbital systems with complicated band structures, we demonstrate that the low energy physics which is responsible for high-$T_c$ superconductivity is essentially governed by one effective Hamiltonianwith two almost decoupled orbitals near half filling. This underlining electronic structure is protected by the $S_4$ symmetry. With repulsive or strong next nearest neighbor antiferromagnetic exchange interactions, each single-orbital effective Hamiltonian results in a robust $A_{1g}$ s-wave pairing which can be exactly mapped to the d-wave pairing observed in cuprates. The classification of the superconducting(SC) states according to the $S_4$ symmetry leads to a natural prediction of the existence of two different phases named A and B phases. In the B phase, the superconducting order has an overall sign change along c-axis between the top and bottom As(Se) planes in a single Fe-(As)Se trilayer structure, which is an analogy of the sign change under the $90^{\circ }$ degree rotation in the d-wave SC state of cuprates. Our derivation provides a unified understanding of iron-pnictides and iron-chalcogenides, and suggests that cuprates and iron-based superconductors share identical high-$T_c$ superconducting mechanism.

8 figures. 10 pages. Note: the paper Arxiv:1203.2304 are combined together in this new version

References in corpus (21)

• 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${}_x$}
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
• Theory of Electron Nematic Order in LaOFeAs
• A minimal two-band model for the superconducting Fe-pnictides
• Ising and Spin orders in Iron-based Superconductors
• Funtional Renormalization Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs Based High Temperature Superconductors
• Heavily electron-doped electronic structure and isotropic superconducting gap in AxFe2Se2 (A=K,Cs)
• Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides
• Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors
• Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors
• Superconducting gap symmetry of Ba0.6K0.4Fe2As2 studied by angle-resolved photoemission spectroscopy
• Multiple Nodeless Superconducting Gaps in (Ba0.6K0.4)Fe2As2 Superconductor from Angle-Resolved Photoemission Spectroscopy
• Strong nodeless pairing on separate electron Fermi surface sheets in (Tl, K)Fe${}_{1.78}$Se${}_2$ probed by ARPES
• Valley density-wave and multiband superconductivity in Fe-pnictides
• Spin waves in the $(\pi ,0)$ magnetically ordered iron chalcogenide Fe${}_{1.05}$Te
• ARPES studies of the electronic structure of LaOFe(P,As)
• Surface and bulk electronic structures of LaOFeAs studied by angle resolved photoemission spectroscopy

Cited by in corpus (45)

• Role of the orbital degree of freedom in iron-based superconductors
• Space group symmetry, spin-orbit coupling and the low energy effective Hamiltonian for iron based superconductors
• Topological Characters in Fe(Te${}_{1-x}$Se${}_x$) thin films
• Enhanced superconductivity and evidence for novel pairing in single-layer FeSe on SrTiO3 thin film under large tensile strain
• Possible nodal superconducting gap emerging at the Lifshitz transition in heavily hole-doped Ba0.1K0.9Fe2As2
• Angle-resolved photoemission evidence of s-wave superconducting gap in KxFe2-ySe2 superconductor
• Electronic Evidence of an Insulator-Superconductor Transition in Single-Layer FeSe/SrTiO3 Films
• Topological Phases in the Single-Layer FeSe
• Classification of multipole superconductivity in multi-orbital systems and its implications
• Quantum Monte Carlo Study of Pairing Symmetry and Correlation in Iron-based Superconductors
• The effect of As-Chain layers in CaFeAs${}_2$
• Reliability and applicability of magnetic force linear response theory: Numerical parameters, predictability, and orbital resolution
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Observation of an isotropic superconducting gap at the Brillouin zone center of Tl${}_{0.63}$K${}_{0.37}$Fe${}_{1.78}$Se${}_2$
• Topological superconducting states in monolayer FeSe/SrTiO${}_3$
• Electronic phase separation in iron pnictides
• Topological Nonsymmorphic Crystalline Superconductors
• Identification of prototypical Brinkman-Rice Mott physics in a class of iron chalcogenides superconductors
• Functional renormalization group study of the pairing symmetry and pairing mechanism in iron-selenide superconductors
• Vertical loop nodes in iron-based superconductors
• High Tc superconductivity in CaKFe${}_4$As${}_4$ in absence of nematic fluctuations
• Glide-Plane Symmetry and Superconducting Gap Structure of Iron-Based Superconductors
• Disorder effects in multiorbital $s_{\pm }$-wave superconductors: Implications for Zn-doped BaFe${}_2$As${}_2$ compounds
• Glide reflection symmetry, Brillouin zone folding and superconducting pairing for the $P4/nmm$ space group
• Improper s-wave symmetry for the electronic pairing in iron-based superconductors by first-principles calculation
• Ground state pairing correlations in the $S_4$ symmetric microscopic model for iron-based superconductors
• Phase diagram of doped BaFe${}_2$As${}_2$ superconductor under broken $C_4$ symmetry
• TAO pairing: a fully gapped pairing scenario for the Iron-Based Superconductors
• Superconductivity in a single layer alkali-doped FeSe: a weakly coupled two-leg ladder system
• Evolution of the Fermi surface topology in doped 122 iron pnictides
• ARPES observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe${}_{0.75}$Ru${}_{0.25}$)${}_2$As${}_2$
• Quadrupolar charge dynamics in the nonmagnetic FeSe${}_{1-x}$S${}_x$ superconductors
• Signatures of nodeless multiband superconductivity and particle-hole crossover in the vortex cores of FeTe${}_{0.55}$Se${}_{0.45}$
• 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
• Evidence the ferromagnetic order on CoSb layer of LaCoSb${}_2$
• Angle-resolved photoemission studies of the superconducting gap symmetry in Fe-based superconductors
• Fermi surface evolution and checker-board block-spin antiferromagnetism in $A_x$Fe${}_{2-y}$Se${}_2$
• Magnetic domain walls induced by twin boundaries in low doped Fe-pnictides
• BaCuS2: a superconductor with moderate electron-electron correlation
• Superconducting Gaps via Raman Scattering in Iron Superconductors
• Effects of single- and multi-substituted Zn ions in doped-122 type iron-based superconductors
• Study of non-Fermi Liquid behavior from partial nesting in multi-orbital superconductors
• A Short Review of the $S_4$ Symmetric Microscopic Model for Iron-Based High Temperature Superconductors
• Phase diagram of the isovalent phosphorous-substituted 122-type iron pnictides
• Band antiferromagnetism in a two-band model for iron pnictides