Zeeman effect in superconducting two-leg ladders: irrational magnetization plateaus and exceeding the Pauli limit

Abstract

The effect of a parallel magnetic field on superconducting two-leg ladders is investigated numerically. The magnetization curve displays an irrational plateau at a magnetization equal to the hole density. Remarkably, its stability is fundamentally connected to the existence of a well-known magnetic resonant mode. Once the zero-field spin gap is suppressed by the field, pairs acquire a finite momentum characteristic of a Fulde-Ferrell-Larkin-Ovchinnikov phase. In addition, S^z=0 triplet superconducting correlations coexist with singlet ones above the irrational plateau. This provides a simple mechanism in which the Pauli limit is exceeded as suggested by recent experiments.

4 pages, 6 figures

References in corpus (17)

• The density-matrix renormalization group
• Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
• Density matrix renormalization group algorithms with a single center site
• Magnetization Plateaux in N-Leg Spin Ladders
• Superconductivity in a Quasi One Dimensional Spin Liquid
• Non-perturbative approach to Luttinger's theorem in one dimension
• Friedel Oscillations and Charge Density Waves in Chains and Ladders
• Magnetization Curves of Antiferromagnetic Heisenberg Spin-1/2 Ladders
• Evidence for a superfluid density in t--J ladders
• Absence of spin gap in the superconducting ladder compound Sr_2Ca_{12}Cu_{24}O_{41}
• Hole redistribution in Sr\_(14-x)Ca\_xCu\_24O\_41 (x = 0, 12) spin ladder compounds: ^63Cu and ^17O NMR study under pressure
• Resonant magnetic mode in superconducting 2-leg ladders
• Emergence of Irrationality: Magnetization Plateaux in Modulated Hubbard Chains
• Doping-dependent magnetization plateaux in p-merized Hubbard chains
• Generalization of the Luttinger Theorem for Fermionic Ladder Systems
• Doping Induced Magnetization Plateaus
• Hubbard ladders in a magnetic field

Cited by in corpus (17)

• Anomalous In-Plane Anisotropy of the Onset of Superconductivity in (TMTSF)2ClO4
• Diamagnetism of doped two-leg ladders and probing the nature of their commensurate phases
• Pair correlations of a spin-imbalanced Fermi gas on two-leg ladders
• Magnetic-Field Variations of the Pair-Breaking Effects of Superconductivity in (TMTSF)2ClO4
• Strong parity mixing in the FFLO superconductivity in systems with coexisting spin and charge fluctuations
• Bosonization and density-matrix renormalization group studies of Fulde-Ferrell-Larkin-Ovchinnikov phase and irrational magnetization plateaus in coupled chains
• Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets
• Quasi one-dimensional organic conductors: from Fröhlich conductivity and Peierls insulating state to magnetically-mediated superconductivity, a retrospective
• NMR and NQR study of pressure-induced superconductivity and the origin of critical-temperature enhancement in the spin-ladder cuprate Sr${}_2$Ca${}_{12}$Cu${}_{24}$O${}_{41}$
• Pairing competition in a quasi-one-dimensional model of organic superconductors (TMTSF)${}_{2}X$ in magnetic field
• Pair Density Waves in coupled doped two-leg Ladders
• Magnetization plateau as a result of the uniform and gradual electron doping in a coupled spin-electron double-tetrahedral chain
• Pair density wave characterized by a hidden string order parameter
• Doping-dependent magnetization plateaus of a coupled spin-electron chain: exact results
• Superconducting and density-wave instabilities of low dimensional conductors with a Zeeman coupling to a magnetic field
• Energy gap of neutral excitations implies vanishing charge susceptibility
• Magnetic field induced criticality in superconducting two-leg ladders