ARPES view of orbitally resolved quasiparticle lifetimes in iron pnictides

Abstract

We study with ARPES the renormalization and quasiparticle lifetimes of the $d_{xy}$ and $d_{xz}$/$d_{yz}$ orbitals in two iron pnictides, LiFeAs and Ba(Fe${}_{0.92}$Co${}_{0.08}$)${}_2$As${}_2$ (Co8). We find that both quantities depend on orbital character rather than on the position on the Fermi Surface (for example hole or electron pocket). In LiFeAs, the renormalizations are larger for $d_{xy}$, while they are similar on both types of orbitals in Co8. The most salient feature, which proved robust against all the ARPES caveats we could think of, is that the lifetimes for $d_{xy}$ exhibit a markedly different behavior than those for $d_{xz}$/$d_{yz}$. They have smaller values near $E_F$ and exhibit larger $\omega$ and temperature dependences. While the behavior of $d_{xy}$ is compatible with a Fermi liquid description, it is not the case for $d_{xz}$/$d_{yz}$. This situation should have important consequences for the physics of iron pnictides, which have not been considered up to now. More generally, it raises interesting questions on how a Fermi liquid regime can be established in a multiband system with small effective bandwidths.

References in corpus (39)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• 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${}_2$
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Selective Mottness as a key to iron superconductors
• Janus-faced influence of the Hund's rule coupling in strongly correlated materials
• Many-body Effects in Angle-resolved Photoemission: Quasiparticle Energy and Lifetime of a Mo(110) Surface State
• Superconductivity without magnetism in LiFeAs
• Hall effect and resistivity study of the magnetic transition, carrier content and Fermi liquid behavior in Ba(Fe(1-x) Cox)2As2
• Correlation between linear resistivity and $T_c$ in the Bechgaard salts and the pnictide superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Role of multiband effects and electron-hole asymmetry in the superconductivity and normal state properties of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Fermi surface of superconducting LaFePO determined by quantum oscillations
• Satellites and large doping- and temperature-dependence of electronic properties in hole-doped BaFe2As2
• Fe-based superconductors: an angle-resolved photoemission spectroscopy perspective
• Where Are the Extra d Electrons in Transition-Metal Substituted Fe Pnictides?
• Self-consistent self-energy analysis of photoemission data
• Bare electron dispersion from photoemission experiments
• Fe-based superconductors: seven years later
• Evidence for Three-Dimensionality in the Fermi Surface Topology of Layered Electron Doped Ba(Fe1-XCox)2As2 Iron Superconductors
• Effects of correlation in LiFeAs
• Nesting between hole and electron pockets in Ba(Fe1-xCox)2As2 (x=0-0.3) observed with angle-resolved photoemission
• The orbital characters of bands in iron-based superconductor BaFe1.85Co0.15As2
• Impact of the 2 Fe unit cell on the electronic structure measured by ARPES in iron pnictides
• Optical Response of Sr${}_2$RuO${}_4$ Reveals Universal Fermi-liquid Scaling and Quasiparticles Beyond Landau Theory
• Influence of the Third Dimension of Quasi-Two-Dimensional Cuprate Superconductors on Angle-Resolved Photoemission Spectra
• Orbital selective Fermi surface shifts and mechanism of high T${}_c$ superconductivity in correlated AFeAs (A=Li,Na)
• Extraordinary quasiparticle scattering and bandwidth-control by dopants in iron-based superconductors
• Large temperature dependence of the number of carriers in Co-doped BaFe2As2
• A de Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs
• Three-dimensional electronic structure of superconducting iron pnictides observed by angle-resolved photoemission spectroscopy
• Time of life as it is in LiFeAs
• Existence, character and origin of surface-related bands in the high temperature iron pnictide superconductor BaFe_{2-x}Co_{x}As_{2}
• Multiorbital effects on the transport and the superconducting fluctuations in LiFeAs
• Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with suppressed superconductivity in LiFe${}_{1-x}$Co${}_x$As
• Electronic band structure of ferro-pnictide superconductors from ARPES experiment
• Non-Fermi-liquid scattering rates and anomalous band dispersion in ferropnictides
• Direct observation of a Fermi liquid-like normal state in an iron-pnictide superconductor

Cited by in corpus (16)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Orbital-dependent Fermi Surface shrinking as a fingerprint of nematicity in FeSe
• Orbital-differentiated coherence-incoherence crossover identified by photoemission spectroscopy in LiFeAs
• Effect of non-local correlations on the electronic structure of LiFeAs
• Non-local correlations in Iron Pnictides and Chalcogenides
• Evidence of hot and cold spots on the Fermi surface of LiFeAs
• Experimental evidence for the importance of Hund's exchange interaction for the incoherence of the charge carriers in iron-based superconductors
• Fermi surface and effective masses in photoemission response of the (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$ superconductor
• Hund's metal crossover and superconductivity in the 111 family of iron-based superconductors
• Observation of non-Fermi liquid behavior in hole-doped LiFe${}_{1-x}$V${}_x$As
• On the Spatial Locality of Electronic Correlations in LiFeAs
• Linkage between scattering rates and superconductivity in doped ferropnictides
• The Three-Dimensional Electronic Structure of LiFeAs: Strong-coupling Superconductivity and Topology in the Iron Pnictides
• Constraints on the total coupling strength to bosons in iron based superconductors
• Influence of the surface symmetry breaking on the magnetism, collapsing and three dimensional dispersion of Co pnictides ACo2As2 (A=Ba, Sr, Ca)
• Orbital-selective correlations and renormalized electronic structure in LiFeAs