Order-Parameter Fluctuations in the Frustrated Heisenberg Model on the Square Lattice

Authors

Shu Zhang, University of Rhode Island
Gerhard Müller, University of Rhode IslandFollow

Document Type

Article

Date of Original Version

4-15-1996

Abstract

The T=0 dynamics of the two‐dimensional s=1/2 Heisenberg model with competing nearest‐neighbor (J ₁) and next‐nearest‐neighbor (J ₂) interactions is explored via the recursion method, specifically the frequency‐dependent fluctuations of the order parameters associated with some of the known or suspected ordering tendencies in this system, i.e., Néel, collinear, dimer, and chiral order. The results for the dynamic structure factors of the respective fluctuation operators show a strong indication of collinear order at J ₂/J ₁≳0.6 and a potential for dimer order at 0.5≲J ₂/J ₁≲0.6, whereas the chiral ordering tendency is observed to be considerably weaker.

Citation/Publisher Attribution

Shu Zhang and Gerhard Müller. Order-parameter fluctuations in the frustrated Heisenberg model on a square lattice. J. Appl. Phys. 79 (1996), 6630-6632.

Available at: http://dx.doi.org/10.1063/1.361906

Publisher Statement

Copyright 1996 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

The following article appeared in Journal of Applied Physics and may be found at http://dx.doi.org/10.1063/1.361906.