A magnetic model for the incommensurate I phase of spin-Peierls systems
G. S. Uhrig, F. Schoenfeld, J. P. Boucher
TL;DR
This paper introduces a magnetic model for the incommensurate I phase of spin-Peierls systems, explaining experimental observations and predicting dynamical incommensurabilities based on lattice distortion and magnetization interactions.
Contribution
The paper presents a novel magnetic model that accounts for the incommensurate I phase in spin-Peierls systems, linking lattice distortion harmonicity with magnetization to explain experimental data.
Findings
Model explains NMR, ESR, and light scattering results for CuGeO_3
Predicts dynamical incommensurabilities in fluctuation spectra
Lattice distortion adjusts to magnetization to maintain a gapful system
Abstract
A magnetic model is proposed for describing the incommensurate I phase of spin-Peierls systems. Based on the harmonicity of the lattice distortion, its main ingredient is that the distortion of the lattice adjusts to the average magnetization such that the system is always gapful. The presence of dynamical incommensurabilities in the fluctuation spectra is also predicted. Recent experimental results for CuGeO_3 obtained by NMR, ESR and light scattering absorption are well understood within this model.
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