Orbital Fluctuation-Induced Triplet Superconductivity : Mechanism of Superconductivity in ${\mathrm{Sr}}_2{\mathrm{RuO}}_4$

Abstract

The mechanism of superconductivity in ${\mathrm{Sr}}_2{\mathrm{RuO}}_4$ is studied using a degenerate Hubbard model within the weak coupling theory. When the system approaches the orbital instability which is realized due to increasing the on-site Coulomb interaction between the electrons in the different orbitals, it is shown that the triplet superconductivity appears. This superconducting mechanism is only available in orbitally degenerate systems with multiple Fermi surfaces.

5 pages, 4 figures

Cited by in corpus (72)

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• Chiral P-Wave Order in Sr_2RuO_4
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• Minimal electronic models for superconducting BiS${}_2$ layers
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• Gap Structure of the Spin-Triplet Superconductor Sr2RuO4 Determined from the Field-Orientation Dependence of Specific Heat
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• Inelastic neutron scattering study of magnetic excitations in Sr${}_2$RuO${}_4$
• Stabilizing Even-Parity Chiral Superconductivity in Sr${}_2$RuO${}_4$
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• Intrinsic Hall effect in a multiband chiral superconductor in the absence of an external magnetic field
• Microscopic Identification of the D-vector in Triplet Superconductor Sr_2RuO_4
• Large Chern Number and Edge Currents in Sr2RuO4
• Stability of a metallic state in the two-orbital Hubbard model
• Spin fluctuations in Sr2RuO4 from polarized neutron scattering: implications for superconductivity
• Pairing Symmetry Competition in Organic Superconductors
• Spin Triplet Superconductivity in Sr2RuO4 due to Orbital and Spin Fluctuations: Analysis by Two-Dimensional Renormalization Group Theory
• Spin-triplet superconductivity in Sr2RuO4 due to orbital and spin fluctuations: Analyses by two-dimensional renormalization group theory and self-consistent vertex-correction method
• Anisotropy of the incommensurate fluctuations in Sr2RuO4: a study with polarized neutrons
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• Spin Fluctuation Induced Superconductivity Controlled by Orbital Fluctuation
• Determination of the Fermi Velocity by Angle-dependent Periodic Orbit Resonance Measurements in the Organic Conductor alpha-(BEDT-TTF)2KHg(SCN)4
• Inelastic neutron scattering study of the magnetic fluctuations in Sr${}_2$RuO${}_4$
• Quantum Monte Carlo study for multiorbital systems with preserved spin and orbital rotational symmetries
• Role of vertex corrections in the matrix formulation of the random phase approximation for the multiorbital Hubbard model
• Off-site-repulsion induced Triplet Superconductivity: a possibility of chiral p${}_{x+y}$ pairing in Sr${}_2$RuO${}_4$
• Superconductivity in Sr${}_2$RuO${}_4$ Mediated by Coulomb Scattering
• Even-parity spin-triplet pairing for orbitally degenerate correlated electrons by purely repulsive interactions
• Quantum Monte Carlo study of the pairing symmetry competition in the Hubbard model
• Microscopic theory of tunneling spectroscopy in Sr${}_2$RuO${}_4$
• Superconductivity and Antiferromagnetism in Three-Dimensional Hubbard model
• Theory of the Evolution of Superconductivity in Sr${}_2$RuO${}_4$ under Anisotropic Strain
• Superconducting pairing in Sr${}_2$RuO${}_4$ from weak to intermediate coupling
• Superconducting mechanism for the cuprate Ba${}_2$CuO${}_{3+\delta }$ based on a multiorbital Lieb lattice model
• Microscopic Approach to Magnetism and Superconductivity of $f$-Electron Systems with Filled Skutterudite Structure
• Pauli-paramagnetic effects on mixed state properties in a strongly anisotropic superconductor ---Application to Sr_2_RuO_4_---
• Functional renormalization group study of orbital fluctuation mediated superconductivity: Impact of the electron-boson coupling vertex corrections
• Strong magnetic field enhancement of spin triplet pairing arising from coexisting $2k_F$ spin and $2k_F$ charge fluctuations
• Spin polarized transport in the weak-link between $f$-wave superconductors
• Josephson effect in a multi-orbital model for Sr${}_2$RuO${}_4$
• Ferromagnetism and Superconductivity in the multi-orbital Hubbard Model: Hund's Rule Coupling versus Crystal-Field Splitting
• Fermi-Surface Topology and Pairing Symmetry in BiS${}_2$-Based Layered Superconductors
• Anomalous Hall conductivity of clean Sr2RuO4 at finite temperatures
• Spin-orbit Coupling and Multiple Phases in Spin-triplet Superconductor Sr${}_2$RuO${}_4$
• Low temperature electronic properties of Sr_2RuO_4 II: Superconductivity
• Manipulating 4f quadrupolar pair interactions in TbB2C2 using a magnetic field
• Whether there is the intrinsic Hall effect in a multi-band superconductor?
• Identifying possible pairing states in Sr${}_2$RuO${}_4$ by tunneling spectroscopy
• Superconductivity in the Orbital Degenerate Model for Heavy Fermion Systems
• Plain $s$-wave superconductivity near the magnetic criticality: Enhancement of attractive electron-boson coupling vertex corrections
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• Spin susceptibility for orbital-singlet Cooper pair in the three-dimensional Sr${}_2$RuO${}_4$ superconductor
• Triplet Pairing Superconductivity Induced by Short-Range Ferromagnetic Correlations in Sr${}_2$RuO${}_4$
• Theory of tunneling spectroscopy of normal metal/ferromagnet/spin-triplet superconductor junctions
• Interband Coulomb Interaction and Horizontal Line Nodes in Triplet Superconductor Sr${}_2$RuO${}_4$
• Anisotropic Superconductivity Emerging from the Orbital Degrees of Freedom in a ${\Gamma }_3$ Non-Kramers Doublet System
• Orbital-cooperative spin fluctuation and orbital-dependent transport in ruthenates
• Two-dimensional incommensurate magnetic fluctuations in Sr${}_2$(Ru${}_{0.99}$Ti${}_{0.01}$)O${}_4$
• A review of some new perspectives on the theory of superconducting Sr${}_2$RuO${}_4$
• Impurity induced magnetic ordering in Sr${}_2$RuO${}_4$
• Competition between spin fluctuations in Ca${}_{2-x}$Sr${}_x$RuO${}_4$ around $x=0.5$
• Local nodal Cooper pairs in multiorbital systems
• Cyclotron resonance in the layered perovskite superconductor Sr2RuO4
• Spin-orbit-coupled superconductivity with spin-singlet non-unitary pairing
• Quasiparticle Interactions for f${}^2$-Impurity Anderson Model with Crystalline-Electric-Field: Numerical Renormalization Group Study
• Surface State of Inter-orbital Pairing State in Sr${}_2$RuO${}_4$ Superconductor
• Calculated Spin Fluctuational Pairing Interaction in HgBa2CuO4 using LDA+FLEX Method
• Weak-Coupling Theory for Multiband Superconductivity Induced by Jahn-Teller Phonons
• Calculations of Spin Fluctuation Spectral Functions ${\alpha }^{2}F$ in High-Temperature Superconducting Cuprates
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