Sr${}_2$VO${}_3$FeAs: A Nanolayered Bimetallic Iron Pnictide Superconductor

Abstract

One of the unifying concepts in the iron-pnictide superconductors, both for the mechanism of magnetic ordering and of unconventional order parameter character, has been the electron and hole Fermi surfaces that are approximately nested. Using the density functional methods that have predicted Fermi surfaces correctly in SrFe${}_2$P${}_2$, we find that the recently reported superconducting Sr${}_2$VO${}_3$FeAs, with $T_c$=37 K and no apparent competition between magnetism and superconductivity, possesses different Fermi surface geometry and character than previous classes of iron pnictides. The intervening layer (a V bilayer) gives rise to bands that cross the Fermi level. Coupling to the FeAs layer is small except for interaction along the zone boundary, however that coupling degrades the Fermi surface nesting. Sr${}_2$VO${}_3$FeAs, with its alternating layers of open shell atoms, deserves further close study that should help to understand the origin of the properties of iron pnictide compounds.

6 pages and 4 embedded figures

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Cited by in corpus (22)

• Phase diagram and Gap anisotropy in Iron-Pnictide Superconductors
• Fe-based superconductors: an angle-resolved photoemission spectroscopy perspective
• Self doping effect and successive magnetic transitions in superconducting Sr${}_2$VFeAsO${}_3$
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Correlation of Fe-based Superconductivity and Electron-Phonon Coupling in an FeAs/Oxide Heterostructure
• Magnetic Ordering in Blocking Layer and Highly Anisotropic Electronic Structure of High-Tc Iron-based Superconductor Sr2VFeAsO3: LDA+U Studies
• Eliashberg theory for spin-fluctuations mediated superconductivity -- Application to bulk and monolayer FeSe
• Suppression of superconductivity by V-doping and possible magnetic order in Sr2VO3FeAs
• Structural and transport properties of Sr2VO{3-delta}FeAs superconductors with different oxygen deficiencies
• Superconductivity and Crystal Structure of the Palladium-Iron-Arsenides Ca10(Fe1-xPdxAs)10Pd3As8
• Magnetic Ordering in V-Layers of the Superconducting System of Sr2VFeAsO3
• Static magnetic order of Sr${}_4$A${}_2$O${}_6$Fe${}_2$As${}_2$ (A = Sc and V) revealed by local probes
• Weak magnetism and the Mott-state of vanadium in superconducting Sr2VO3FeAs
• Brief review on iron-based superconductors: are there clues for unconventional superconductivity?
• Direct observation of the influence of the FeAs4 tetrahedron on superconductivity and antiferromagnetic correlations in Sr2VO3FeAs
• Superconducting transition temperatures in the electronic and magnetic phase diagrams of Sr2VFeAsO3-delta, a superconductor
• Pressure Dependence of Superconducting Transition Temperature on Perovskite-Type Fe-Based Superconductors and NMR Study of Sr2VFeAsO3
• Electronic properties of new low-temperature superconductors: 3.3K (Ni2P2)(Sr4Sc2O6) and 2.7K (Ni2As2)(Sr4Sc2O6) from first principles
• Coupled Magnetic and Superconducting Transitions in Sr${}_2$VO${}_3$FeAs Under Pressure
• Effects of metallic spacer in layered superconducting Sr2(Mg${}_y$Ti${}_{1-y}$)O3FeAs
• Role of Vanadium-Oxide Layer in Electronic State of Sr${}_2$VFeAsO${}_{3-\delta }$ with Oxygen Deficiency
• Proximity-induced hidden order transition in a correlated heterostructure Sr${}_2$VO${}_3$FeAs