Impurity-induced quasiparticle interference in the parent compounds of iron-pnictide superconductors

Abstract

The impurity-induced quasiparticle interference(QPI) in the parent compounds of iron-pnictide superconductors is investigated based on a phenomenological two-orbital four-band model and T-matrix method. We find the QPI is sensitive to the value of the magnetic order which may vary from one compound to another. For small value of the magnetic order, the pattern of oscillation in the local density of states (LDOS) induced by the QPI exhibits two-dimensional characteristics, consistent with the standing wave state observed in the 1111 compound. For larger value of the magnetic order, the main feature of the spatial modulation of the LDOS is the existence of one-dimensional stripe structure which is in agreement with the nematic structure in the parent compound of the 122 system. In both cases the system shows $C_2$ symmetry and only in the larger magnetic order case, there exist in-gap bound states. The corresponding QPI in $q$-space is also presented. The patterns of modulation in the LDOS at nonzero energies are attributed to the interplay between the underlying band structure and Fermi surfaces.

9 pages,12 figures

References in corpus (26)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Effects of Co substitution on thermodynamic and transport properties and anisotropic $H_{c2}$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ single crystals
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Electronic structure of the iron-based superconductor LaOFeP
• Nodal Spin Density Wave and band topology of the FeAs based materials
• Lattice and Magnetic structures of PrFeAsO, PrFeAsO0.85F0.15 and PrFeAsO0.85
• Antiferromagnetically Driven Electronic Correlation in Iron Pnictides and Cuprates
• Electronic structure of heavily electron-doped BaFe${}_{1.7}$Co${}_{0.3}$As${}_2$ studied by angle-resolved photoemission
• The cleavage surface of the BaFe_(2-x)Co_(x)As_(2) and Fe_(y)Se_(1-x)Te_(x) superconductors: from diversity to simplicity
• Nanoscale superconducting gap variations, strong coupling signatures and lack of phase separation in optimally doped BaFe1.86Co0.14As2
• Surface and bulk electronic structures of LaOFeAs studied by angle resolved photoemission spectroscopy
• Surface-driven electronic structure in LaFeAsO studied by angle resolved photoemission spectroscopy
• Quasiparticle interference in iron-based superconductors
• Spectroscopic Imaging Scanning Tunneling Microscopy as a Probe of Orbital Structures and Ordering
• Quasiparticle interference of C2-symmetric surface states in LaOFeAs parent compound
• Quasiparticle states around a nonmagnetic impurity in electron-doped iron-based superconductors with spin-density-wave order
• Quasiparticle interference in antiferromagnetic parent compounds of Fe-based superconductors
• Domain Walls in Normal and Superconducting States of Iron Pnictides
• Impurity states in antiferromagnetic Iron Arsenides

Cited by in corpus (18)

• Anisotropic Impurity-States, Quasiparticle Scattering and Nematic Transport in Underdoped Ca(Fe1-xCox)2As2
• Bound States of Defects in Superconducting LiFeAs Studied by Scanning Tunneling Spectroscopy
• Doping dependence of the anisotropic quasiparticle interference in NaFe1-xCoxAs iron-based superconductors
• Tunneling spectroscopy for probing orbital anisotropy in iron pnictides
• Multiorbital and hybridization effects in the quasiparticle interference of triplet superconductor Sr2RuO4
• Full t-matrix approach to quasiparticle interference in non-centrosymmetric superconductors
• Gap function of hexagonal pnictide superconductor SrPtAs from quasiparticle interference spectrum
• Observation of isosceles triangular electronic structure around excess iron atoms in Fe${}_{1+\delta }$Te
• Superfluid density in the $s_{\pm }$-wave state of clean iron-based superconductors
• Tunneling interstitial impurity in iron-chalcogenide based superconductors
• Highly anisotropic quasiparticle interference patterns in the spin-density wave state of the iron pnictides
• Theory of Mixed-State Effect on Quasiparticle Interference in Iron-based Superconductors
• Anomalous sharp peak in the London penetration depth induced by the nodeless-to-nodal superconducting transition in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Momentum space imaging of locally noncentrosymmetric superconductors
• Probing Sign-Changing Order Parameters via Impurity States in unconventional superconductors: Implications for La${}_3$Ni${}_2$O${}_7$ Superconductors with interlayer pairing
• Robust $s_{\pm }$-wave superconductivity against multi-impurity in iron-based superconductors
• Competing ferromagnetic superconducting states in europium-based iron pnictides
• General, Strong Impurity-Strength Dependence of Quasiparticle Interference