Superconducting gap for a 2-leg t-J ladder

Abstract

Single-particle diagonal and off-diagonal Green's functions of a 2-leg t-J ladder at 1/8-doping are investigated by Exact Diagonalisations techniques. A numerically tractable expression for the superconducting gap is proposed and the frequency dependence of the real and imaginary parts of the gap are determined. The role of the low-energy gapped spin modes whose energies are computed by a (one-step) Contractor Renormalization procedure are discussed.

3 pages, 7 figures

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• Quantum Spin Dynamics Due to Strong Kitaev Interactions in the Triangular-Lattice Antiferromagnet CsCeSe${}_2$
• A Field Theory for Fermionic Ladder with Generic Intrachain Interactions
• Direct Connection between Mott Insulator and d-Wave High-Temperature Superconductor Revealed by Continuous Evolution of Self-Energy Poles
• Breakdown of the Bloch-wave behavior for a single hole in a gapped antiferromagnet
• Bosonization and density-matrix renormalization group studies of Fulde-Ferrell-Larkin-Ovchinnikov phase and irrational magnetization plateaus in coupled chains
• Intrinsic translational symmetry breaking in a doped Mott insulator
• Doped two-leg ladder with ring exchange
• Signatures of pairing in the magnetic excitation spectrum of strongly correlated ladders
• Exploring Contractor Renormalization: Tests on the 2-D Heisenberg Antiferromagnet and Some New Perspectives
• d-wave pairing in lightly doped Mott insulators
• Topological Doping and Superconductivity in Cuprates: An Experimental Perspective
• Superconductivity in a model of two Hubbard chains coupled with ferromagnetic exchange interaction
• The Gap Function Phi(k,w) for a Two-leg t-J Ladder and the Pairing Interaction
• Singlet pairing and superconductivity in t-J ladders with Mott insulating stripes
• Contractor renormalization group theory of the SU($N$) chains and ladders
• Confinement-Induced Enhancement of Superconductivity in a Spin-$\frac{1}{2}$ Fermion Chain Coupled to a ${\mathbb{Z}}_2$ Lattice Gauge Field
• Enhanced superconductivity and various edge modes in modulated $t$-$J$ chains
• Formation of clusters in the ground state of the $t-J$ model on a two leg ladder
• Magnetic field induced criticality in superconducting two-leg ladders