Time of life as it is in LiFeAs

Abstract

The time of life of fermionic quasiparticles, the distribution of which in the momentum-energy space can be measured by angle resolved photoemission (ARPES), is the first quantity to look for fingerprints of interaction responsible for the superconducting pairing. Such an approach has been recently used for superconducting cuprates, but its direct application to pnictides was not possible due to essential three-dimensionality of the electronic band structure and magnetic ordering. Here, we report the investigation of the quasiparticle lifetime in LiFeAs, a non-magnetic stoichiometric superconductor with a well separated two-dimensional band. We have found two energy scales: the lower one contains clear fingerprints of optical phonon modes while the higher scale indicates a presence of strong electron-electron interaction. The result suggests that LiFeAs is a phonon mediated superconductor with strongly enhanced electronic density of states at the Fermi level.

reevaluated electron-phonon coupling strength, added references

References in corpus (31)

• The superconductivity at 18 K in LiFeAs system
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• Is LaO${}_{1-x}$F${}_x$FeAs an electron-phonon superconductor ?
• Nearly Isotropic superconductivity in (Ba,K)Fe2As2
• Electronic Structure and Doping in BaFe${}_2$As${}_2$ and LiFeAs: Density Functional Calculations
• Pairing Symmetry and Pairing State in Ferropnictides: Theoretical Overview
• A Survey of the Van Hove Scenario for High-T_c Superconductivity With Special Emphasis on Pseudogaps and Striped Phases
• The effect of collective spin-1 excitations on electronic spectra in high-Tc superconductors
• Structure and superconductivity of LiFeAs
• Superconductivity without magnetism in LiFeAs
• Anisotropic electron-phonon interaction in the cuprates
• Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor
• (pi,pi)-electronic order in iron arsenide superconductors
• Multiple Bosonic Mode Coupling in Electron Self-Energy of (La_2-xSr_x)CuO_4
• Unconventional electronic reconstruction in undoped (Ba,Sr)Fe${}_2$As${}_2$ across the spin density wave transition
• Self-consistent self-energy analysis of photoemission data
• Bare electron dispersion from photoemission experiments
• Constituents of the "kink" in high-Tc cuprates
• Direct extraction of the Eliashberg function for electron-phonon coupling: A case study of Be(1010)
• Ultrafast transient response and electron-phonon coupling in the iron-pnictide superconductor Ba(Fe(1-x)Co(x))2As2
• Weak superconducting pairing and a single isotropic energy gap in stoichiometric LiFeAs
• Electronic Structure of New LiFeAs High-Tc Superconductor
• Theory for Magnetism and Triplet Superconductivity in LiFeAs
• Coexistence of metallicity and superconductivity in adjacent bilayers of a high-Tc superconductor
• Antiferromagnetic fluctuations in the normal state of LiFeAs
• Electron-phonon coupling and charge gap in spin-density-wave iron-pnictides from quasiparticle relaxation dynamics
• Bosonic Spectral Function and The Electron-Phonon Interaction in HTSC Cuprates
• NMR evidence of strong-correlated superconductivity in LiFeAs: tuning toward an SDW ordering
• Electronic and lattice dynamical properties of the iron-based superconductors LiFeAs and NaFeAs
• Electronic Structure of New AFFeAs Prototype of Iron Arsenide Superconductors
• Conventional Superconductivity in Fe-Based Pnictides: the Relevance of Intra-Band Electron-Boson Scattering

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• Gap Symmetry in KFe_2As_2 and cos 4θgap component in LiFeAs
• Multiorbital effects on the transport and the superconducting fluctuations in LiFeAs
• Sign inversion in the superconducting order parameter of LiFeAs inferred from Bogoliubov quasiparticle interference
• ARPES experiment in fermiology of quasi-2D metals (Review Article)
• Electronic band structure of ferro-pnictide superconductors from ARPES experiment
• Identifying the `Fingerprint' of Antiferromagnetic Spin-Fluctuations on Iron-Pnictide Superconductivity
• An ARPES view on the high-Tc problem: phonons vs spin-fluctuations
• Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering
• Specific heat of Ca${}_{0.32}$Na${}_{0.68}$Fe${}_2$As${}_2$ single crystals: unconventional s${}_{\pm }$ multi-band superconductivity with intermediate repulsive interband coupling and sizable attractive intraband couplings
• 75As NMR-NQR study in superconducting LiFeAs
• Electron-phonon coupling in cuprate and iron-based superconductors revealed by Raman scattering
• Superconductivity-induced nematicity
• Incommensurate antiferromagnetic fluctuations in single-crystalline LiFeAs studied by inelastic neutron scattering
• Evidence of hot and cold spots on the Fermi surface of LiFeAs
• Electronic band structure of optimal superconductors: from cuprates to ferropnictides and back again
• ARPES view of orbitally resolved quasiparticle lifetimes in iron pnictides
• Raman Scattering Study of the Lattice Dynamics of Superconducting LiFeAs
• Multigap superconductivity in RbCa2Fe4As4F2 investigated using muSR measurements
• Surface and bulk electronic structure of unconventional superconductor Sr_2RuO_4: unusual splitting of the beta-band
• Unusual temperature evolution of superconductivity in LiFeAs
• Anomalous superconducting state in LiFeAs implied by the ${}^{75}$As Knight shift measurement
• Interband Quasiparticle Scattering in Superconducting LiFeAs Reconciles Photoemission and Tunneling Measurements
• Pairing symmetry of an intermediate valence superconductor CeIr3 investigated using muSR measurements
• Investigation of LiFeAs by means of "Break-junction" Technique
• Probing the Order Parameter of Superconducting LiFeAs using Pb/LiFeAs and Au/LiFeAs Point-Contact Spectroscopy
• Normal and superconducting properties of LiFeAs explained in the framework of four-band Eliashberg Theory
• Defect states in LiFeAs as seen by low temperature scanning tunneling microscopy and spectroscopy
• Absence of hexagonal to square structural transition in LiFeAs vortex matter
• Anisotropy of the superconducting fluctuations in multiband superconductors: the case of LiFeAs
• Electron-boson spectral density of LiFeAs obtained from optical data
• Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor
• Dispersion kinks from electronic correlations in an unconventional iron-based superconductor
• Unconventional superconductivity mediated solely by isotropic electron-phonon interaction
• Downfolding the Su-Schrieffer-Heeger model