Statics and dynamics of the magnetic soliton lattice in the high-field phase of CuGeO3

Driven by antiferromagnetic quantum fluctuations on a deformable lattice, s pin-Peierls systems dimerize magnetically and structurally at low temperatu res. In this dimer phase all excitations with non-zero magnetization have a finite energy. The energy gain by a finite induced magnetization overcomes the energy gap at a critical magnetic field strength H-c. Above H-c, an in commensurately modulated magnetic and distortive domain wall pattern is for med. The magnetic modulation pattern and the low-energy excitation spectrum in this high-field phase of the inorganic spin-Peierls compound CuGeO3 are fully determined by elastic and inelastic neutron scattering and discussed together with theoretical predictions as well as other experimental result s. (C) 2001 Elsevier Science B.V. All rights reserved.