Raman Scattering from Frustrated Quantum Spin Chains

Abstract

Magnetic Raman scattering from a frustrated spin-1/2 Heisenberg-chain is considered with a focus on the uniform phase of the spin-Peierls compound CuGeO_3. The Raman intensity is analyzed in terms of a Loudon-Fleury scattering process using a spinless-fermion mean-field theory developed for the frustrated spin-chain. A comparison to experimental data is presented and the frustration and temperature dependence is studied. In good agreement with observed spectra a broad inelastic four-spinon continuum is found at low temperatures above the spin-Peierls transition. At high temperatures the intensity develops a quasi-elastic line analogous to experiment.

13 pages, Revtex, 3 eps-figures

References in corpus (5)

• Double gap and solitonic excitations in the spin-Peierls chain CuGeO3
• Dynamic correlations of antiferromagnetic spin-1/2 XXZ chains at arbitrary temperature from complete diagonalization
• Frustration induced Raman scattering in CuGeO_3
• Magnetic interactions and the pressure phase-diagram of CuGeO3
• Spin dynamics of dimerized Heisenberg chains

Cited by in corpus (13)

• Magnetic light scattering in low-dimensional quantum spin systems
• Zero-frequency transport properties of one dimensional spin-1/2 systems
• Thermal conductivity of anisotropic and frustrated spin-1/2 chains
• Spin gap behavior and charge ordering in α^{\prime}-NaV_2O_5 probed by light scattering
• Magnetic excitations and phonons in the spin-chain compound NaCu2O2
• Jordan-Wigner approach to the frustrated spin one-half XXZ chain
• Spinons and damped phonons in spin-1/2 quantum-liquid Ba${}_4$Ir${}_3$O${}_{10}$ observed by Raman scattering
• Dzyaloshinskii-Moriya interaction in NaV${}_2$O${}_5$: a microscopic study
• The transverse field XY model on the diamond chain
• Raman Scattering cross section of Spin Ladders
• Electronic Properties of α'-NaV_2O_5
• Crystalline topological defects within response theory
• Phonon anomalies and critical scaling in the spin-$1/2$ trimer chain Na${}_2$Cu${}_3$Ge${}_4$O${}_{12}$