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Mechanisms for spin supersolidity in S=12 spin-dimer antiferromagnets

J.-D. Picon, A. F. Albuquerque, K. P. Schmidt, N. Laflorencie, M. Troyer, and F. Mila
Phys. Rev. B 78, 184418 – Published 17 November 2008

Abstract

Using perturbative expansions and the contractor renormalization (CORE) algorithm, we obtain effective hard-core bosonic Hamiltonians describing the low-energy physics of S=1/2 spin-dimer antiferromagnets known to display supersolid phases under an applied magnetic field. The resulting effective models are investigated by means of mean-field analysis and quantum Monte Carlo simulations. A “leapfrog mechanism,” through means of which extra singlets delocalize in a checkerboard-solid environment via correlated hoppings, is unveiled that accounts for the supersolid behavior.

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  • Received 31 July 2008

DOI:https://doi.org/10.1103/PhysRevB.78.184418

©2008 American Physical Society

Authors & Affiliations

J.-D. Picon1,2, A. F. Albuquerque1,3, K. P. Schmidt4, N. Laflorencie5, M. Troyer1, and F. Mila2

  • 1Theoretische Physik, ETH Zürich, 8093 Zürich, Switzerland
  • 2Institute of Theoretical Physics, EPF Lausanne, 1015 Lausanne, Switzerland
  • 3School of Physics, The University of New South Wales, Sydney, New South Wales 2052, Australia
  • 4Lehrstuhl für Theoretische Physik I, TU Dortmund, Otto-Hahn-Straße 4, D-44221 Dortmund, Germany
  • 5Laboratoire de Physique des Solides, Université Paris-Sud, UMR-8502 CNRS, 91405 Orsay, France

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Issue

Vol. 78, Iss. 18 — 1 November 2008

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