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, thermodynamic response functions are obtained down to ultra-low temperatures. We extract the critical scaling exponents which dictate the power-law dependence of the transition temperature on the applied magnetic field. These are compared with recent experiments on candidate materials and with predictions for the Bose-Einstein condensation of magnons obtained in mean-field theory.
@article{arxiv.cond-mat/0105464,
title = {Field-Induced Magnetic Order in Quantum Spin Liquids},
author = {Stefan Wessel and Maxim Olshanii and Stephan Haas},
journal= {arXiv preprint arXiv:cond-mat/0105464},
year = {2009}
}