Evidence for site-centered stripes from magnetic excitations in CuO superconductors

Details Evidence for site-centered stripes from magnetic excitations in CuO superconductors Evidence for site-centered stripes from magnetic excitations in CuO superconductors

2010-09-16

arxiv.org/abs/1009.3122v1

Phys. Rev. B 82, 144509 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.82.144512

The success of models of coupled two-leg spin ladders in describing the magnetic excitation spectrum of La_[2-x]Ba_xCuO_4 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 stripes modeled by two- or three-leg ladders, 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.

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