Abstract
Low-energy spin excitations were investigated in the static stripe phase of using elastic and inelastic neutron scattering on single crystals. For in which long-range static stripe order exists, an energy gap of exists in the excitation spectrum in addition to strong quasielastic, incommensurate spin fluctuations associated with the static stripes. When increases, the spectral weight of the spin fluctuations shifts from the quasielastic continuum to the excitation spectrum above . The dynamic correlation length as a function of energy and the temperature evolution of the energy spectrum suggest a phase separation of two distinct magnetic phases in real space.
- Received 17 April 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.047001
©2009 American Physical Society