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

Martin Greiter and Holger Schmidt
Phys. Rev. B 82, 144512 – Published 15 October 2010

Abstract

The success of models of coupled two-leg spin ladders in describing the magnetic excitation spectrum of La2xBaxCuO4 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.

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  • Received 19 May 2010

DOI:https://doi.org/10.1103/PhysRevB.82.144512

©2010 American Physical Society

Authors & Affiliations

Martin Greiter and Holger Schmidt

  • Institut für Theorie der Kondensierten Materie, KIT, Campus Süd, D 76128 Karlsruhe, Germany

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Issue

Vol. 82, Iss. 14 — 1 October 2010

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