Raman Response in Antiferromagnetic Two-Leg S=1/2 Heisenberg Ladders

Abstract

The Raman response in the antiferromagnetic 2-leg S=1/2 Heisenberg ladder is calculated for various couplings by continuous unitary transformations. For leg couplings above 80% of the rung coupling a characteristic 2-peak structure occurs with a point of zero intensity within the continuum. Experimental data for CaV_2O_5 and La_yCa_(14-y)Cu_24O_41 are analyzed and the coupling constants are determined. Evidence is found that the Heisenberg model is not sufficient to describe cuprate ladders. We argue that a cyclic exchange term is the appropriate extension.

4 pages with 4 figures included

References in corpus (3)

• Observation of two-magnon bound states in the two-leg ladders of (Ca,La)14Cu24O41
• Fractional and Integer Excitations in Quantum Antiferromagnetic Spin 1/2 Ladders
• Raman cross section of spin ladders

Cited by in corpus (37)

• Magnetic light scattering in low-dimensional quantum spin systems
• Excitations in one-dimensional S=1/2 quantum antiferromagnets
• The Structure of Operators in Effective Particle-Conserving Models
• Spectral Properties of Magnetic Excitations in Cuprate Two-Leg Ladder Systems
• Spin-chirality duality in a spin ladder with four-spin cyclic exchange
• Scattering particles in quantum spin chains
• High Order Perturbation Theory for Spectral Densities of Multi-Particle Excitations: S=1/2 Two-Leg Heisenberg Ladder
• Enhanced Perturbative Continuous Unitary Transformations
• Adapted continuous unitary transformation to treat systems with quasiparticles of finite lifetime
• Phase Diagram of the Heisenberg Spin Ladder with Ring Exchange
• Spectral properties of the dimerized and frustrated $S=1/2$ chain
• Scalar chiral ground states of spin ladders with four-spin exchanges
• Magnetic properties of the spin-1/2 Ising-Heisenberg diamond chain with the four-spin interaction
• Raman Response of Magnetic Excitations in Cuprate Ladders and Planes
• Staggered dimer order in S=1/2 quantum spin ladder system with four spin exchange
• Topological Identification of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
• Frustration in an exactly solvable mixed-spin Ising model with bilinear and three-site four-spin interactions on a decorated square lattice
• Evidence for Dimer Crystal Melting in the Frustrated Spin-Ladder BiCu2PO6
• Quantum criticality in the coupled two-leg spin ladder Ba2CuTeO6
• Charge order induced sharp Raman peak in Sr_14Cu_24O_41
• Jordan-Wigner approach to dynamic correlations in spin-ladders
• A generalized perspective on non-perturbative linked cluster expansions
• Magnetic Phase Diagram of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
• Magnetic excitations in two-leg spin 1/2 ladders: experiment and theory
• Dynamic structure factor of disordered quantum spin ladders
• Breathers and Raman scattering in a two-leg ladder with staggered Dzialoshinskii-Moriya interaction
• Circulating-current states and ring-exchange interactions in cuprates
• Theory of Raman Scattering in One-Dimensional Quantum Spin-1/2 Antiferromagnets
• High pressure Raman study of the quantum magnet (C${}_4$H${}_{12}$N${}_2$)Cu${}_2$Cl${}_6$
• Charge density waves in Sr_14-xCa_xCu_24O_41: electron correlations vs. structural effects
• Linked Cluster Expansions via Hypergraph Decompositions
• Raman study of spin excitations in the tunable quantum spin ladder Cu(Qnx)(Cl${}_{1-x}$Br${}_x$)${}_2$
• Thermodynamic Properties of Spin Ladders with Cyclic Exchange
• Two-magnon Raman scattering in spin-ladders with exact singlet-rung ground state
• $K$ -edge and $L_3$ -edge RIXS study of columnar and staggered quantum dimer phases of the square lattice Heisenberg model
• Raman resonance in spin S two-leg ladder systems
• Resonant two-magnon Raman scattering in two-dimensional and ladder-type Mott insulators