Infrared Measurement of the Pseudogap in P-Doped and Co-Doped BaFe2As2 High-Temperature Superconductors

Abstract

We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe2As2 family. Our experiments have identified hallmarks of the pseudogap state in the BaFe2As2 system that mirror the spectroscopic manifestations of the pseudogap in the cuprates. The magnitude of the infrared pseudogap is in accord with that of the spin-density-wave gap of the parent compound. By monitoring the superconducting gap of both P- and Co-doped compounds, we find that the infrared pseudogap is unrelated to superconductivity. The appearance of the pseudogap is found to correlate with the evolution of the antiferromagnetic fluctuations associated with the spin-density-wave instability. The strong-coupling analysis of infrared data further reveals the interdependence between the magnetism and the pseudogap in the iron pnictides.

References in corpus (38)

• High-temperature superconductivity in iron-based materials
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Electrodynamics of Correlated Electron Materials
• Intra-unit-cell electronic nematicity of the high-Tc copper-oxide pseudogap states
• Broken rotational symmetry in the pseudogap phase of a high-Tc superconductor
• Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
• Nematic and meta-nematic transitions in the iron pnictides
• FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
• Two Gaps Make a High Temperature Superconductor?
• Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors
• From a single-band metal to a high-temperature superconductor via two thermal phase transitions
• From a single-band metal to a high-temperature superconductor via two thermal phase transitions (Supporting Material)
• Uniaxial strain detwinning of CaFe2As2 and BaFe2As2: optical and transport study
• Contrasting Spin Dynamics Between Underdoped and Overdoped Ba(Fe[1-x]Co[x])2As2
• Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2
• Line nodes in the energy gap of high-temperature superconducting BaFe_2(As_{1-x}P_x)_2 from penetration depth and thermal conductivity measurements
• Nematic spin fluid in the tetragonal phase of BaFe2As2
• Unconventional superconductivity and antiferromagnetic quantum critical behavior in the isovalent-doped BaFe2(As1-xPx)2
• Evolution of the Fermi surface of BaFe_2(As_{1-x}P_x)_2 on entering the superconducting dome
• Evolution of the optical spectrum with doping in iron pnictides Ba(Fe1-xCox)2As2
• Superfluid density and penetration depth in Fe-pnictides
• Bosons in high temperature superconductors: an experimental survey
• Evidence for multiple superconducting gaps in optimally doped BaFe${}_{1.87}$Co${}_{0.13}$As${}_2$ from infrared spectroscopy
• On the optical conductivity of Electron-Doped Cuprates I: Mott Physics
• Fermi surface dichotomy of the superconducting gap and pseudogap in underdoped pnictides
• Multigap superconductivity and strong electron-boson coupling in Fe-based superconductors: A point-contact Andreev-reflection study of Ba(Fe1-xCox)2As2 single crystals
• Charge dynamics of the Co-doped BaFe${}_2$As${}_2$
• Optical properties of the iron-arsenic superconductor BaFe1.85Co0.15As2
• The a-axis optical conductivity of detwinned ortho-II YBa_2Cu_3O_6.50
• Eliashberg approach to superconductivity-induced infrared anomalies in Ba0.68K0.32Fe2As2
• Optical properties of BaFe${}_{2-x}$Co${}_x$As${}_2$
• London penetration depth and strong pair-breaking in iron-based superconductors
• Enhanced Fermi surface nesting in superconducting BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ revealed by de Haas-van Alphen effect
• Effects of energy dependence in the quasiparticle density of states on far-infrared absorption in the pseudogap state
• Iron pnictide superconductors: Electrons on the verge
• Optical investigations of the chemical pressurized EuFe2(As1-xPx)2: an s-wave superconductor with strong interband interaction
• Pseudogap-like phase in Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ revealed by ${}^{75}$As NQR
• Antiferromagnetic Critical Fluctuations in BaFe${}_2$As${}_2$

Cited by in corpus (38)

• Quantum critical point lying beneath the superconducting dome in iron-pnictides
• Unconventional Superconductivity
• Pseudogap formation above the superconducting dome in iron-pnictides
• Critical Quadrupole Fluctuations and Collective Modes in Iron Pnictide Superconductors
• Spectroscopic Evidence of Superconductivity Pairing at 83 K in Single-Layer FeSe/SrTiO3 Films
• Optical conductivity and Raman scattering of iron superconductors
• Optical conductivity of iron-based superconductors
• Nonlocal correlations induced by Hund's coupling: a cluster DMFT study
• Coincident structural and magnetic order in BaFe${}_2$(As${}_{1-x}$)P${}_x$)${}_2$ revealed by high-resolution neutron diffraction
• Two-dimensional Massless Dirac Fermions in Antiferromagnetic AFe2As2 (A = Ba, Sr)
• Anisotropic resistivity of Na${}_{1-\delta }$Fe${}_{1-x}$Co${}_x$As
• On infrared pseudogap in cuprate and pnictide high-temperature superconductors
• Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)2As2
• Pseudogap behavior in charge density wave kagome material ScV${}_6$Sn${}_6$ revealed by magnetotransport measurements
• Interplane resistivity of underdoped single crystals (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$, $0\le x<0.34$
• Spin-density-wave-induced anomalies in the optical conductivity of AFe2As2, (A=Ca, Sr, Ba) single-crystalline iron pnictides
• Optical properties of $A$Fe${}_2$As${}_2$ ($A=$Ca, Sr, and Ba) single crystals
• Inter-plane resistivity of isovalent doped BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Antiferromagnetic spin correlations and pseudogap-like behavior in Ca(Fe1-xCox)2As2 studied by 75As nuclear magnetic resonance and anisotropic resistivity
• BiS2 - based superconductivity in F-substituted NdOBiS2
• Diverging Nematic Susceptibility, Physical Meaning of T* scale, and Pseudogap in the Spin Fermion Model for Pnictides
• Anisotropy of electronic correlations: On the applicability of local theories to layered materials
• Weak-coupling superconductivity in a strongly correlated iron pnictide
• Violation of the Wiedemann-Franz law as an evidence of the pseudogap in the iron-based superconductor Ba(Fe1-xCox)2As2
• Optical properties of superconducting EuFe2(As1-xPx)2
• Reentrant phases in electron-doped ${\text{EuFe}}_2{\text{As}}_2$: spin glass and superconductivity
• Transmittance and reflectance measurements at terahertz frequencies on a superconducting BaFe_{1.84}Co_{0.16}As_2 ultrathin film: an analysis of the optical gaps in the Co-doped BaFe_2As_2 pnictide
• Ultralow-dissipative conductivity by Dirac fermions in BaFe${}_2$As${}_2$
• Intrinsic charge dynamics in high-Tc AFeAs(O,F) superconductors
• Possible superconducting fluctuation and pseudogap state above $T_c$ in CsFe${}_2$As${}_2$
• Superconductivity-induced transverse plasma mode and phonon anomaly in the $c$-axis response of the bilayer compound RbCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Pressure suppression of spin-density-wave gap in the optical conductivity of SrFe2As2
• Diverse Exotic Orders and Fermiology in Fe-based Superconductors: A Unified Mechanism for $B_{1g}/B_{2g}$ Nematicity in FeSe/(Cs,Rb)Fe${}_2$As${}_2$ and Smectic Order in BaFe${}_2$As${}_2$
• NMR evidence for a Peierls transition in the layered square-net compound LaAgSb${}_2$
• Signatures of superconducting and pseudogap phases in ultrafast transient reflectivity of Ca(Fe0.927Co0.073)2As2
• Strong electron-boson coupling in the iron-based superconductor BaFe1.9Pt0.1As2 revealed by infrared spectroscopy
• Interplay between the charge density wave phase and a pseudogap under antiferromagnetic correlations
• Magneto-orbital coupling in iron pnictides