Phys. Rev. Lett. 80, 5196–5199 (1998)Critical Temperature and the Transition from Quantum to Classical Order Parameter Fluctuations in the Three-Dimensional Heisenberg AntiferromagnetReceived 17 February 1998; published in the issue dated 8 June 1998 We present results of extensive quantum Monte Carlo simulations of the three-dimensional S = 1/2 Heisenberg antiferromagnet. Finite-size scaling of the spin stiffness and the sublattice magnetization gives the critical temperature Tc/J = 0.946±0.001. The critical behavior is consistent with the classical 3D Heisenberg universality class, as expected. We discuss the general nature of the transition from quantum mechanical to classical (thermal) order parameter fluctuations at a continuous Tc>0 phase transition. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.5196
DOI:
10.1103/PhysRevLett.80.5196
PACS:
75.10.Jm, 05.30.-d, 75.40.Cx, 75.40.Mg
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.