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Accueil du site > Publications > Publications 2008 > Mechanisms for Spin-Supersolidity in S=1/2 Spin-Dimer Antiferromagnets

Mechanisms for Spin-Supersolidity in S=1/2 Spin-Dimer Antiferromagnets

J.-D. Picon, A. F. Albuquerque, K. P. Schmidt, N. Laflorencie, M. Troyer, F. Mila

par Nicolas Laflorencie - 29 juillet 2008

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.