Stripes, spin resonance and $d_{x^2-y^2}-$pairing symmetry in FeSe-based layered superconductors

Abstract

We calculate RPA-BCS based spin resonance spectra of newly discovered iron-selenide superconductor using two orbitals tight-binding (TB) model. The slightly squarish electron pocket Fermi surfaces (FSs) at $(\pi ,0)/(0,\pi )-$momenta produce leading interpocket nesting instability at incommensurate vector $q\sim (\pi ,0.5\pi )$ in the normal state static susceptibility, pinning a strong stripe-like spin-density wave (SDW) or antiferromagnetic (AFM) order at some critical value of $U$. The same nesting also induces $d_{x^2-y^2}-$pairing. The superconducting (SC) gap is nodeless and isotropic on the FSs as they are concentric to the four-fold symmetry point of the $d-$wave gap maxima, in agreement with various measurements. This induces an slightly incommensurate spin resonance with `hour-glass'-like dispersion feature, in close agreement with neutron data of chalcogenides. We also calculate $T$ pendence of the SC gap solving BCS gap equations and find that the spin resonance follows the same $T$ evolution of $\Delta (T)$ both in energy and intensity, suggesting that an itinerant weak or intermediate pair coupling theory is relevant in this system.

arXiv comment4.5 pages, 4 figures; Submitted (v2): Some types are corrected (v3): Expanded and published version

References in corpus (34)

• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• A minimal two-band model for the superconducting Fe-pnictides
• Heavily electron-doped electronic structure and isotropic superconducting gap in AxFe2Se2 (A=K,Cs)
• Fe-based high temperature superconductivity with Tc=31K bordering an insulating antiferromagnet in (Tl,K)FexSe2 Crystals
• Normal-State Spin Dynamics and Temperature-Dependent Spin Resonance Energy in an Optimally Doped Iron Arsenide Superconductor
• Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor with Tc=27K
• Spin resonance in the d-wave superconductor CeCoIn5
• The Spin Excitation Spectrum in Superconducting $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_{6.85}$
• Spin Gap and Resonance at the Nesting Wavevector in Superconducting FeSe0.4Te0.6
• Distinct Fermi Surface Topology and Nodeless Superconducting Gap in (Tl0.58Rb0.42)Fe1.72Se2 Superconductor
• From high temperature supercondutivity to quantum spin liquid: progress in strong correlation physics
• d-wave pairing from spin fluctuations in the KxFe{2-y}Se2 superconductors
• Coexistence of Magnetism and Superconductivity in the Iron-based Compound Cs_0.8(FeSe_0.98)_2
• Universal relation between magnetic resonance and superconducting gap in unconventional superconductors
• Evolution of spin excitations into the superconducting state in FeTe1-xSex
• The Electron Pairing of K${}_x$Fe${}_{2-y}$Se${}_2$
• Strong nodeless pairing on separate electron Fermi surface sheets in (Tl, K)Fe${}_{1.78}$Se${}_2$ probed by ARPES
• Novel neutron resonance mode in $d_{x^2-y^2}$ superconductors
• Neutron Scattering Resonance and the Fe-pnictide Superconducting Gap
• Electronic structures and magnetic orders of Fe-vacancies ordered ternary iron selenides TlFe${}_{1.5}$Se${}_2$ and AFe${}_{1.5}$Se${}_2$ (A=K, Rb, or Cs)
• Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe${}_{0.6}$Se${}_{0.4}$ superconductor
• 77Se NMR Investigation of the K(x)Fe(2-y)Se(2) High Tc Superconductor (Tc=33K)
• 77Se NMR study of pairing symmetry and spin dynamics in KyFe2-xSe2
• Nodeless superconductivity in K${}_x$Fe${}_{2-y}$Se${}_2$ single crystals revealed by low temperature specific heat
• A competing order scenario of two-gap behavior in hole doped cuprates
• Nodeless d-wave superconducting pairing due to residual antiferromagnetism in underdoped Pr${}_{2-x}$Ce${}_x$CuO${}_{4-\delta }$
• Optical model-solution to the competition between a pseudogap phase and a Mott-gap phase in high-temperature cuprate superconductors
• Electronic Structure of KFe${}_2$Se${}_2$ from First Principles Calculations
• Nonmonotonic $d_{x^2-y^2}$ superconducting gap in electron-doped Pr${}_{0.89}$LaCe${}_{0.11}$CuO${}_4$: Evidence of coexisting antiferromagnetism and superconductivity?
• Two energy scales in the magnetic resonance spectrum of electron and hole doped pnictide superconductors
• Gutzwiller Magnetic Phase Diagram of the Cuprates
• Possible Superconducting Symmetry and Magnetic Correlations in K0.8Fe2Se2: A 77Se-NMR Study
• Normal-State Hourglass Dispersion of the Spin Excitations in FeSe${}_x$Te${}_{1-x}$
• Emergence of non-Fermi-liquid behavior due to Fermi surface reconstruction in the underdoped cuprate superconductors

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