Magnetic interactions and the pressure phase-diagram of CuGeO3

Abstract

A pressure and temperature dependent Raman study of the vibrational and spin dynamics in CuGeO3 is presented. A new low temperature, high pressure phase has been identified, and a pressure-temperature phase-diagram is proposed for CuGeO3. The pressure dependence of the effective exchange interaction, of the spin-Peierls gap, and of the spin-Peierls temperature strongly supports a model in which next nearest neighbor interactions stabilise the SP ground state. The Raman data allow for a quantitative estimate of the pressure dependence of the next nearest neighbor interactions.

To be published in Phys. Rev. Lett

References in corpus (3)

• Study of the magnetic susceptibility in the spin-Peierls system CuGeO${}_3$
• Frustration induced Raman scattering in CuGeO_3
• Investigation of the Spin-Peierls transition in CuGeO_3 by Raman scattering

Cited by in corpus (13)

• Magnetic light scattering in low-dimensional quantum spin systems
• Reexamination of the microscopic couplings of the quasi one-dimensional antiferromagnet CuGeO_3
• Quantum Monte Carlo in the Interaction Representation --- Application to a Spin-Peierls Model
• Effects of in-chain and off-chain substitutions on spin fluctuations in the spin-Peierls compound CuGeO_3
• Observation of three-magnon light scattering in CuGeO_3
• Investigation of soliton bound states in the Raman spectrum of pure and doped spin-Peierls chains
• On the scaling of the (H-T)-phase diagram of CuGeO${}_3$
• Raman Scattering from Frustrated Quantum Spin Chains
• Lattice dynamics of CuGeO${}_3$ : inelastic neutron scattering and model calculations
• Revival of the spin-Peierls transition in Cu_xZn_(1-x)GeO_3 under pressure
• Optical spectroscopy of pure and doped CuGeO3
• Theory of Raman Scattering in One-Dimensional Quantum Spin-1/2 Antiferromagnets
• Pressure-induced Spin-Peierls to Incommensurate Charge-Density-Wave Transition in the Ground State of TiOCl