The field-induced soliton phase of CuGeO3
The quasi-1D S = 1/2 antiferromagnet CuGeO3 undergoes a spin-Peierls transition to a dimerised singlet quantum ground state, with S = 1 carrying pairs of domain walls as elementary excitations. Applying a large magnetic field, the domain walls-solitons-can be condensed into the ground state, forming a static incommensurate soliton lattice, which has been investigated by neutron scattering. The static soliton structure was found to be in good accordance to field theoretical and numerical calculations, while a low energy incommensurate mode is interpreted as a gapped phason. We anticipate that theoretical description of this and higher energy excitations will provide general insight to the effect of structural fluctuations on correlated electron systems.
Keywords: soliton ; one-dimensional ; spin-Peierls ; magneto-elastic ; ELECTRON-SPIN-RESONANCE ; PEIERLS COMPOUND CUGEO3 ; INCOMMENSURATE PHASE ; NEUTRON-SCATTERING ; LATTICE ; SYSTEMS ; TRANSITION ; CHAINS
CEA Grenoble, DRFMC, SPSMS, MDN, F-38054 Grenoble, France. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. Riso Natl Lab, DK-4000 Roskilde, Denmark. Ronnow, HM, CEA Grenoble, DRFMC, SPSMS, MDN, F-38054 Grenoble, France.
Record created on 2007-01-24, modified on 2016-08-08