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Bond order from disorder in the planar pyrochlore magnet

2003/01/31 by Oleg Tchernyshyov, O. Tchernyshyov, Oleg A. Starykh +5 · 9 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.68.144422

published as Phys. Rev. B 68, 144422 (2003) · Minor clarifications + reference to an informal introduction cond-mat/0308091

arxiv created 2003/08/19 · openalex publication_date 2003/10/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study magnetic order in the Heisenberg antiferromagnet on the checkerboard lattice, a two-dimensional version of the pyrochlore network with strong geometric frustration. By employing the semiclassical (1/S) expansion we find that quantum fluctuations of spins induce a long-range order that breaks the fourfold rotational symmetry of the lattice. The ordered phase is a valence-bond crystal. We discuss similarities and differences with the extreme quantum case S=1/2 and find a useful phenomenology to describe the bond-ordered phases.

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