Pseudogap and Superconductivity in Iron-Based Layered Superconductor Studied by Fluctuation-Exchange Approximation(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

スポンサーリンク

概要

• 論文の詳細を見る

• We investigate interplay between magnetic fluctuations and superconductivity in the effective five-band Hubbard model for iron-oxypnictide superconductors on the basis of the fluctuation-exchange approximation. As for the normal-state properties, we find the pseudogap behavior in the NMR relaxation rate and the spectral weight in the electron-doped region, while we cannot find such behavior in the hole-doped region. The pseudogap behavior originates from the band structure effect, that is, existence of high density of states just below the Fermi level. Solving the superconducting Eliashberg equation, we find that the most probable candidate for the pairing symmetry is the sign-changed s-wave spin-singlet state. For small Hund's coupling J, the eigenvalue is not so sensitive to carrier doping, and seems to be irrelevant with antiferromagnetic (AF) spin fluctuation. We suggest that correlation between spin and spin-quadrupole is important as the pairing mechanism as well as the AF fluctuation.

• 社団法人日本物理学会の論文
• 2008-12-15

著者

• Ikeda Hiroaki

  Department Of Cancer Vaccine Mie University Graduate School Of Medicine

• Ikeda Hiroaki

  Department Of Physics Kyoto University

• IKEDA Hiroaki

  Department of Physics, Kyoto University

関連論文

• Mechanical Injury of the Subthalamic Area During Stereotactic Surgery Followed by Improvement of Trunk, Neck, and Face Tremor : Case Report
• Efficacy of Navigation in Skull Base Surgery using Composite Computer Graphics of Magnetic Resonance and Computed Tomography Images
• Fourth-Order Perturbation Expansion for Hubbard Model on a Two-Dimensional Square Lattice(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
• Study of Superconducting Transition Temperature in d-p Model on Basis of Perturbation Theory(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
• Theory of Superconductivity in CeMIn_5 (M=Co, Rh, Ir) on the Basis of the Three Dimensional Periodic Anderson Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Fourth Order Perturbation Theory for Normal Selfenergy in Repulsive Hubbard Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Calculation of Penetration Depth and T_c in κ-(ET)_2Cu(NCS)_2 under Pressure(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Theory of Superconductivity in PuCoGa_5 (Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Possible Pairing Symmetry of Superconductor Na_xCoO_2・yH_2O (Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Analysis of Superconductivity Induced by On-site Coulomb Repulsion on Three-dimensional Cubic Lattice : Based on Third Order Perturbation Theory
• Possible Mechanism of Superconductivity in Ce-Based Heavy Fermion Compounds : Analysis Based on the Third-Order Perturbation Theory
• Study of Superconductivity in Borocarbides on the Basis of Perturbation Theory
• Monte Carlo Study on the Nuclear Magnetic Ordering in Scandium Crystal:Possibility of a Ferrimagnetic State
• Possibility of f-Wave Spin-Triplet Superconductivity in the CoO_2 Superconductor : A Case Study on a 2D Triangular Lattice in the Repulsive Hubbard Model
• Perturbation Theory on the Superconductivity of Heavy Fermion Superconductors CeIr_xCo_In_5
• Analysis of Superconductivity in d-p Model on Basis of Perturbation Theory(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Perturbation Analysis of Superconductivity in the Trellis-Lattice Hubbard Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Perturbation Theory for a Repulsive Hubbard Model in Quasi-One-Dimensional Superconductors (Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Synthesis of Polymer Microspheres with Mercapto Groups by Polycondensation of 1,3-Propanedithiol and 1,6-Dibromohexane in the Presence of a Poly[styrene-alkylacrylamide] Latex
• The Mechanisms by Which Latanoprost Free Acid Inhibits Human Carbonic Anhydrase I and II(Biochemistry)
• Timolol Activates the Enzyme Activities of Human Carbonic Anhydrase I and II
• 16-6 OPRICAL-FIBER DATA TRANSMISSION SYSTEM FOR PFM AUDIO SIGNAL
• Detoxication Treatment for Carbamazepine and Lithium Overdose
• Daily Cost of Ophthalmic Solutions for Treating Glaucoma in Japan
• Electronic Structure and Magnetic and Optical Properties of NiAs-type Transition-Metal Chalcogenides MX (M=Fe, Co; X=S, Se)
• DBS RECEIVER UTILIZING OPTICAL FIBER AS INTERMEDIATE FREQUENCY TRANSMISSION LINE
• OPTICAL FIBER TWO-WAY FM VIDEO SIGNAL TRANSMISSION FOR VIDEO CONFERENCING APPLICATIONS
• Glucocorticoid-induced tumor necrosis factor receptor stimulation enhances the multifunctionality of adoptively transferred tumor antigen-specific CD8^+ T cells with tumor regression
• Possibility of f-Wave Spin-Triplet Superconductivity in the CoO_2 Superconductor : A Case Study on a 2D Triangular Lattice in the Repulsive Hubbard Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Vernet's Syndrome Caused by Large Mycotic Aneurysm of the Extracranial Internal Carotid Artery After Acute Otitis Media : Case Report
• Interplay of Crystal Field Structures with f^2 Configuration to Heavy Fermions(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
• True Meaning of "Localized" f-Electrons Measured by dHvA Experiments in Ce-Based Heavy Fermion Metals (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
• A Theory of Anisotropic Semiconductor of Heavy Fermions
• Compressibility of Rodlike and Coiled Polymers in Solution
• Pseudogap and Superconductivity in Iron-Based Layered Superconductor Studied by Fluctuation-Exchange Approximation(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
• Compressibility of Polymer in Solution in the MHz Range
• Fermi-Surface Evolution by Transition-Metal Substitution in the Iron-based Superconductor LaFeAsO
• Study of Superconductivity in Borocarbides on the Basis of Perturbation Theory
• Is Fermi-Surface Nesting the Origin of Superconductivity in Iron Pnictides?: A Fluctuation–Exchange-Approximation Study
• Erratum: "Pseudogap and Superconductivity in Iron-Based Layered Superconductor Studied by Fluctuation–Exchange Approximation"
• Erratum: "Possible Mechanism of Superconductivity in Ce-Based Heavy Fermion Compounds: Analysis Based on the Third-Order Perturbation Theory"
• Calculation of Penetration Depth and T_c in κ-(ET)_2Cu(NCS)_2 under Pressure(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

もっと見る 閉じる

スポンサーリンク