Correlation of Fe-based Superconductivity and Electron-Phonon Coupling in an FeAs/Oxide Heterostructure

Abstract

Interfacial phonons between iron-based superconductors (FeSCs) and perovskite substrates have received considerable attention due to the possibility of enhancing preexisting superconductivity. Using scanning tunneling spectroscopy, we studied the correlation between superconductivity and e-ph interaction with interfacial-phonons in an iron-based superconductor Sr${}_2$VO${}_3$FeAs ($T_c\approx$ 33 K) made of alternating FeSC and oxide layers. The quasiparticle interference measurement over regions with systematically different average superconducting gaps due to the e-ph coupling locally modulated by O vacancies in VO${}_2$ layer, and supporting self-consistent momentum-dependent Eliashberg calculations provide a unique real-space evidence of the forward-scattering interfacial phonon contribution to the total superconducting pairing.

arXiv comment46 pages, 22 figures

References in corpus (36)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Superconductivity in single-layer films of FeSe with a transition temperature above 100 K
• Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3
• Interface-induced superconductivity and strain-dependent spin density wave in FeSe/SrTiO3 thin films
• An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• How Cooper pairs vanish approaching the Mott insulator in Bi2Sr2CaCu2O8+d
• Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+d
• Transition of stoichiometricSr2VO3FeAs to a superconducting state at 37.2 K
• Critical role of substrate in the high temperature superconductivity of single layer FeSe on Nb:BaTiO${}_3$
• Anisotropic Energy Gaps of Iron-based Superconductivity from Intra-band Quasiparticle Interference in LiFeAs
• Electronic identification of the actual parental phase of KxFe2-ySe2 superconductor and its intrinsic mesoscopic phase separation
• Imaging the impact on cuprate superconductivity of varying the inter-atomic distances within individual crystal unit-cells
• Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO3 substrates
• Universal Substrate Effect on the Superconductivity of FeSe Monolayer Films
• Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe/SrTiO${}_3$
• Close relationship between superconductivity and the bosonic mode in Ba0.6K0.4Fe2As2 and Na(Fe0.975Co0.025)As
• Evidence of a spin resonance mode in the iron-based superconductor Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ from scanning tunneling spectroscopy
• Visualizing the microscopic coexistence of spin density wave and superconductivity in underdoped NaFe1-xCoxAs
• Self doping effect and successive magnetic transitions in superconducting Sr${}_2$VFeAsO${}_3$
• Sr${}_2$VO${}_3$FeAs as Compared to Other Fe-based Superconductors
• Evolution from unconventional spin density wave to superconductivity and a novel gap-like phase in NaFe1-xCoxAs
• Sr${}_2$VO${}_3$FeAs: A Nanolayered Bimetallic Iron Pnictide Superconductor
• Imaging the Electron-Boson Coupling in Superconducting FeSe
• Aspects of electron-phonon interactions with strong forward scattering in FeSe Thin Films on SrTiO${}_3$ substrates
• Imaging the Real Space Structure of the Spin Fluctuations in an Iron-based superconductor
• Magnetic Ordering in Blocking Layer and Highly Anisotropic Electronic Structure of High-Tc Iron-based Superconductor Sr2VFeAsO3: LDA+U Studies
• Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor
• Optical study of phonons and electronic excitations in tetragonal Sr${}_2$VO${}_4$
• Magnetic Ordering in V-Layers of the Superconducting System of Sr2VFeAsO3
• Proposal for a bulk material based on a monolayer FeSe on SrTiO3 high-temperature superconductor
• Weak magnetism and the Mott-state of vanadium in superconducting Sr2VO3FeAs
• Interrogating the superconductor Ca10(Pt4As8)(Fe2-xPtxAs2)5 Layer-by-layer
• Frustration-driven C4 symmetric orders in a hetero-structured iron-based superconductor

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• Multiband full-bandwidth anisotropic Eliashberg theory of interfacial electron-phonon coupling and high-T${}_c$ superconductivity in FeSe/SrTiO${}_3$
• Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor
• Eliashberg theory for spin-fluctuations mediated superconductivity -- Application to bulk and monolayer FeSe
• Enhanced superconductivity in FeSe/SrTiO${}_3$ from the combination of forward scattering phonons and spin fluctuations
• Phase competition in a one-dimensional three-orbital Hubbard-Holstein model
• Constraints on the total coupling strength to bosons in iron based superconductors
• Quasi-one Dimensional Nanostructures as Sign of Nematicity in Iron Pnictides and Chalcogenides
• Competing Correlated Insulators in multi-orbital systems coupled to phonons
• Versatile Variable Temperature and Magnetic Field Scanning Probe Microscope for Advanced Material Research
• Strong Momentum-Dependent Electron-Magnon Renormalization of a Surface Resonance on Iron
• Scanning Tunneling Spectroscopy of Subsurface Ag and Ge Impurities in Copper
• Identifying a forward scattering superconductor through pump-probe spectroscopy
• Superconductor-Insulator transition in a two-orbital attractive Hubbard model with Hund's exchange