Spin-Charge Separation in Two-Dimensional Frustrated Quantum Magnets

Andreas Läuchli and Didier Poilblanc
Phys. Rev. Lett. 92, 236404 – Published 10 June 2004

Abstract

The dynamics of a mobile hole in two-dimensional frustrated quantum magnets is investigated by exact diagonalization techniques. Our results provide evidence for spin-charge separation upon doping the kagome lattice, a prototype of a spin liquid. In contrast, in the checkerboard lattice, a symmetry broken valence bond crystal, a small quasiparticle peak is seen for some crystal momenta, a finding interpreted as a restoration of weak holon-spinon confinement.

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  • Received 3 November 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.236404

©2004 American Physical Society

Authors & Affiliations

Andreas Läuchli and Didier Poilblanc

  • Laboratoire de Physique Théorique, CNRS-UMR 5152, Université Paul Sabatier, F-31062 Toulouse, France

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Issue

Vol. 92, Iss. 23 — 11 June 2004

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