Excitations of the field-induced quantum soliton lattice in CuGeO3
The incommensurate magnetic soliton lattice in the high-field phase of a spin-Peierls system results from quantum fluctuations. We have used neutron scattering techniques to study CuGeO3, allowing us to obtain the first complete characterization of the excitations of the soliton lattice. Three distinct excitation branches are observed, all of which are gapped. The two highest energy modes have minimum gaps at the commensurate wave vector and correspond to the creation or annihilation of soliton pairs. The third mode is incommensurate and is discussed in relation to theoretical predictions.
Univ Saarland, D-66123 Saarbrucken, Germany. Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. CEA, CENG, DRFMC, F-38054 Grenoble, France. Univ Paris 11, Lab Chim Solides, Orsay, France. BENSC, D-14109 Berlin, Germany. Tech Univ Munich, D-8000 Munich, Germany. Enderle, M, Univ Saarland, D-66123 Saarbrucken, Germany.
Record created on 2007-01-24, modified on 2016-08-08