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arXiv:cond-mat/0105464 · Physical Review Letters

Field-Induced Magnetic Order in Quantum Spin Liquids

Stefan Weßel, Maxim Olshanii, Stephan Haas

Published Oct 30, 2001• 80 citations
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Abstract

We study magnetic-field-induced three-dimensional ordering transitions in low-dimensional quantum spin liquids, such as weakly coupled, antiferromagnetic spin- 1/2 Heisenberg dimers and ladders. Using stochastic series expansion quantum Monte Carlo simulations, we obtain the critical scaling exponents which dictate the power-law dependence of the transition temperature on the magnetic field. These are compared with recent experiments on candidate materials and with predictions for the Bose-Einstein condensation of magnons. The critical exponents deviate from isotropic mean-field theory and exhibit different scaling behavior at the lower and upper critical magnetic fields.

DOI
10.1103/physrevlett.87.206407

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