Magnetic ordering in blocking layer and highly anisotropic electronic structure of high-Tciron-based superconductorSr2VFeAsO3:LDA+Ustudy

2010/04/27 by Hiroki Nakamura, Masahiko Machida · 28 citations
Business, Management and Accounting · Materials Science · Mathematics · Physics and Astronomy · #Anisotropy #Antiferromagnetism #Blocking (statistics) #Condensed matter physics #Corporate Taxation and Avoidance #Fermi surface #Iron-based superconductors research #Materials science #Mathematics #Physics #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Statistics #Superconductivity #Vanadium #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.82.094503

published in Physical Review B 82(9) (American Physical Society) · 4 pages, 3 figures.

arxiv created 2010/04/27 · openalex publication_date 2010/09/02 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We calculate electronic structures of a high-T_c iron-based superconductor Sr₂VFeAsO₃ by local-density approximation (LDA) plus U method. We assume a checkerboard antiferromagnetic order on its blocking layers including vanadium and strong correlation in d orbits of vanadium through the Hubbard U. While the standard LDA brings about metallic blocking layers and complicated Fermi surface as in the previous literatures, our calculation changes the blocking layer into insulating one and the Fermi surface becomes quite similar to those of other iron-based superconductors. Moreover, the appearance of the insulating blocking layers suggests high anisotropy on quasiparticle transports as experimental results and predicts new types of intrinsic Josephson effects.

Citations

• Superconducting Fe-Based Compounds(A1−xSrx)Fe2As2withA=Kand Cs with Transition Temperatures up to 37 K
• Projector augmented-wave method
• From ultrasoft pseudopotentials to the projector augmented-wave method
• Generalized Gradient Approximation Made Simple
• LiFeAs: An intrinsic FeAs-based superconductor withTc=18 K
• Ab initio Derivation of Low-Energy Model for Iron-Based Superconductors LaFeAsO and LaFePO
• Ab initiomolecular dynamics for liquid metals
• Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis set
• Orbital Occupation, Local Spin, and Exchange Interactions inV2O3
• Superconductivity at 17 K in (Fe2P2)(Sr4Sc2O6): a new superconducting layered pnictide oxide with a thick perovskite oxide layer
• Density-functional theory and strong interactions: Orbital ordering in Mott-Hubbard insulators
• Superconductivity at 38 K in the Iron Arsenide(Ba1−xKx)Fe2As2

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