Fractional and Integer Excitations in Quantum Antiferromagnetic Spin 1/2 Ladders

Abstract

Spectral densities are computed in unprecedented detail for quantum antiferromagnetic spin 1/2 two-leg ladders. These results were obtained due to a major methodical advance achieved by optimally chosen unitary transformations. The approach is based on dressed integer excitations. Considerable weight is found at high energies in the two-particle sector. Precursors of fractional spinon physics occur implying that there is no necessity to resort to fractional excitations in order to describe features at higher energies.

6 pages, 4 figures included, minor text changes, improved figures

References in corpus (2)

• Observation of two-magnon bound states in the two-leg ladders of (Ca,La)14Cu24O41
• Nature of Spin Excitations in Two-dimensional Mott Insulators: Undoped Cuprates and Other Materials

Cited by in corpus (72)

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• Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors
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• Spectral Properties of Magnetic Excitations in Cuprate Two-Leg Ladder Systems
• Thermal transport in one-dimensional spin gap systems
• Roton minimum as fingerprint of magnon-Higgs scattering in ordered quantum antiferromagnets
• Bound states in two-dimensional spin systems near the Ising limit: A quantum finite-lattice study
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• Complete bond-operator theory of the two-chain spin ladder
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• Symmetric and asymmetric excitations of a strong-leg quantum spin ladder
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• Enhanced Perturbative Continuous Unitary Transformations
• High Order Perturbation Theory for Spectral Densities of Multi-Particle Excitations: S=1/2 Two-Leg Heisenberg Ladder
• Spin and thermal conductivity of quantum spin ladders
• Adapted continuous unitary transformation to treat systems with quasiparticles of finite lifetime
• Spectral properties of the dimerized and frustrated $S=1/2$ chain
• Non-Equilibrium Kondo Model with Voltage Bias in a Magnetic Field
• Exact solution for a quantum compass ladder
• Quadrupolar magnetic excitations in an isotropic spin-1 antiferromagnet
• Rung-singlet phase of the S=1/2 two-leg spin-ladder with four-spin cyclic exchange
• Bound states of the ${\varphi }^4$ model via the nonperturbative renormalization group
• Correlated decay of triplet excitations in the Shastry-Sutherland compound SrCu${}_2$(BO${}_3$)${}_2$
• Dynamical Structure Factor for the Alternating Heisenberg Chain: A Linked Cluster Calculation
• Raman Response of Magnetic Excitations in Cuprate Ladders and Planes
• Neutron scattering from a coordination polymer quantum paramagnet
• Mechanisms for Spin-Supersolidity in S=1/2 Spin-Dimer Antiferromagnets
• Bound states and field-polarized Haldane modes in a quantum spin ladder
• Evidence for Dimer Crystal Melting in the Frustrated Spin-Ladder BiCu2PO6
• Microscopic model for Bose-Einstein condensation and quasiparticle decay
• Three-body bound states in antiferromagnetic spin ladders
• Derivation of the t-J model for finite doping
• Non-Equilibrium Scaling Analysis of the Kondo Model with Voltage Bias
• Charge order induced sharp Raman peak in Sr_14Cu_24O_41
• Jordan-Wigner approach to dynamic correlations in spin-ladders
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• A generalized perspective on non-perturbative linked cluster expansions
• Dissipative flow equations
• Series Expansion Analysis of a Frustrated Four-Spin-Tube
• Spectroscopy of a topological phase
• Magnetic excitations in two-leg spin 1/2 ladders: experiment and theory
• Multi-Particle Spectral Properties in the Transverse Field Ising Model by Continuous Unitary Transformations
• Landau's quasi-particle mapping: Fermi liquid approach and Luttinger liquid behavior
• Dynamic structure factor of disordered quantum spin ladders
• Multi-triplet bound states and finite-temperature dynamics in highly frustrated quantum spin ladders
• Dynamical structure factors of $S=1/2$ two-leg spin ladder systems
• Dynamical structure factors of the magnetization-plateau state in the $S=1/2$ bond-alternating spin chain with a next-nearest-neighbor interaction
• Spectral weight contributions of many-particle bound states and continuum
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• Varied Perturbation Theory for the Dispersion Dip in the Two-Dimensional Heisenberg Quantum Antiferromagnet
• Quasi-particle interactions in frustrated Heisenberg chains
• Vertex corrections in the dynamic structure factor in spin ladders
• Linked Cluster Expansions via Hypergraph Decompositions
• Quantitative description of long-range order in the anisotropic spin-1/2 Heisenberg antiferromagnet on the square lattice
• Dynamic structure factor of the antiferromagnetic Kitaev model in large magnetic fields
• Hole Dispersions for Antiferromagnetic Spin-1/2 Two-Leg Ladders by Self-Similar Continuous Unitary Transformations
• Multi-particle excitations and spectral densities in quantum spin-systems
• Strong-coupling expansion and effective hamiltonians
• Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCu${}_2$PO${}_6$
• Magnetic excitations in the stripe phase of high-T_c superconductors
• Two-Dimensionality of Magnetic Excitations on the Trellis Lattice: (La,Sr,Ca)${}_{14}$Cu${}_{24}$O${}_{41}$ and SrCu${}_2$O${}_3$
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• Optical absorption spectra in SrCu_2O_3 two-leg spin ladder
• Motion of Bound Domain Walls in a Spin Ladder
• Effects of Interactions on Dynamic Correlations of Hard-Core Bosons at Finite Temperatures
• Raman resonance in spin S two-leg ladder systems
• Optical spectroscopy of (La,Ca)14Cu24O41 spin ladders: comparison of experiment and theory