Statics and dynamics of the magnetic soliton lattice in the high-field phase of CuGeO3
Driven by antiferromagnetic quantum fluctuations on a deformable lattice, spin-Peierls systems dimerize magnetically and structurally at low temperatures. 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 incommensurately modulated magnetic and distortive domain wall pattern is formed. 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 results.
Keywords: peierls spin transition ; antiferromagnetism-quantum ; excitation-magnetic ; high magnetic field ; neutron scattering ; magnetic ; structure-incommensurate ; PEIERLS COMPOUND CUGEO3 ; INCOMMENSURATE PHASE ; PURE
Univ Saarland, D-66123 Saarbrucken, Germany. Riso Natl Lab, Condensed Matter Phys & Chem Dept, DK-4000 Roskilde, Denmark. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. CEA, CENG, DRFMC, F-38054 Grenoble, France. BENSC, D-14109 Berlin, Germany. Univ Paris 11, Lab Chim Solides, Orsay, France. Enderle, M, Forskningctr Riso, Afdelingen Mat Fys & Kemi, Bygning 108, DK-4000 Roskilde, Denmark.
Record created on 2007-01-24, modified on 2016-08-08