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Neutron scattering study of the field-induced soliton lattice in CuGeO$_3$

H. M. Ronnow·M. Enderle·D. F. McMorrow·L. -P. Regnault·G. Dhalenne·A. Revcolevschi·A. Hoser·K. Prokes·P. Vorderwisch·H. Schneider
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Abstract

CuGeO$_3$ undergoes a transition from a spin-Peierls phase to an incommensurate phase at a critical field of $H_c\approx 12.5$ T. In the high-field phase a lattice of solitons forms, with both structural and magnetic components, and these have been studied using neutron scattering techniques. Our results provide direct evidence for a long-ranged magnetic soliton structure which has both staggered and uniform magnetizations, and with amplitudes that are broadly in accord with theoretical estimates. The magnetic soliton width, $Γ$, and the field dependence of the incommensurability, $δk_{sp}$, are found to agree well with theoretical predictions.

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H. M. Ronnow, M. Enderle, D. F. McMorrow, L. -P. Regnault, G. Dhalenne, A. Revcolevschi, A. Hoser, K. Prokes, P. Vorderwisch, H. Schneider. 1999-12-14. Neutron scattering study of the field-induced soliton lattice in CuGeO$_3$. https://doi.org/10.1103/physrevlett.84.4469

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