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

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

1999-02-19

arxiv.org/abs/cond-mat/9902272v1

Phys. Rev. B 60, 9468 (1999)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1103/PhysRevB.60.9468

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.

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