Abstract
The success of models of coupled two-leg spin ladders in describing the magnetic excitation spectrum of has been widely interpreted as evidence for bond-centered stripes. Here, we determine the magnetic coupling induced by the charge stripes between bond- or site-centered spin stripe modeled by two- or three-leg ladder, respectively. We find that only the site-centered models order. We further report excellent agreement of a fully consistent analysis of coupled three-leg ladders using a spin-wave theory of bond operators with the experiment.
- Received 19 May 2010
DOI:https://doi.org/10.1103/PhysRevB.82.144512
©2010 American Physical Society