Soliton Lattices in the Incommensurate Spin-Peierls Phase: Local Distortions and Magnetizations

Abstract

It is shown that nonadiabatic fluctuations of the soliton lattice in the spin-Peierls system CuGeO_3 lead to an important reduction of the NMR line widths. These fluctuations are the zero-point motion of the massless phasonic excitations. Furthermore, we show that the discrepancy of X-ray and NMR soliton widths can be understood as the difference between a distortive and a magnetic width. Their ratio is controlled by the frustration of the spin system. By this work, theoretical and experimental results can be reconciled in two important points.

9 pages, 5 figures included, Revtex submitted to Physical Review B

References in corpus (13)

• Reexamination of the microscopic couplings of the quasi one-dimensional antiferromagnet CuGeO_3
• Nonadiabatic Approach to Spin-Peierls Transitions via Flow Equations
• Peierls Dimerization with Non-Adiabatic Spin-Phonon Coupling
• Symmetry and dimension of the magnon dispersion of inorganic spin-Peierls systems
• The microscopic spin-phonon coupling constants in CuGeO_3
• NMR imaging of the soliton lattice profile in the spin-Peierls compound CuGeO_3
• Numerical Study of the Incommensurate Phase in Spin-Peierls Systems
• Unified Quantum Mechanical Picture for Confined Spinons in Dimerized and Frustrated Spin S=1/2 Chains
• Finite Temperature DMRG Investigation of the Spin-Peierls Transition in CuGeO${}_3$
• On the Incommensurate Phase in Modulated Heisenberg Chains
• A magnetic model for the incommensurate I phase of spin-Peierls systems
• Lattice Dimerization in the Spin-Peierls Compound CuGeO${}_3$
• On the Incommensurate Phase of Pure and Doped Spin-Peierls System CuGeO_3

Cited by in corpus (13)

• The density-matrix renormalization group
• Neutron scattering study of the field-induced soliton lattice in CuGeO${}_3$
• Magnetization plateaux induced by a coupling to the lattice
• Nuclear Magnetic Resonance in High Magnetic Field: Application to Condensed Matter Physics
• Incommensurate state in a quasi-one-dimensional $S=1/2$ bond-alternating antiferromagnet with frustration in magnetic fields
• Thermal conductivity of pure and Mg-doped CuGeO_3 in the incommensurate phase
• Thermal Conductivity of Mg-doped CuGeO_3
• Incommensurability Effects in Odd Length J_1-J_2 Quantum Spin Chains: On-site magnetization and Entanglement
• Possible Localized Modes in the Uniform Quantum Heisenberg Chains of Sr2CuO3
• One-dimensional fermions with incommensurate hopping close to dimerization
• Excitations of the field-induced soliton lattice in CuGeO3
• Two Coupled Chains are Simpler than One: Field-induced Chirality in a Frustrated Quantum Spin Ladder
• Ordered phases in spin-Peierls systems