Comment on "Probing vortex unbinding via dipole fluctuations"
arXiv:cond-mat/0607632 · doi:10.1103/PhysRevB.76.087401
Abstract
We demonstrate that the method suggested by Fertig and Straley [Phys. Rev. B 66, 201402 (2002)] for the identification of different phases in two-dimensional XY models does not allow to make any unambiguous conclusions and make a tentative proposal of another approach to this problem.
The final version - as published in Physical Review B (2 pages). Two paragraphs have been added with a proposal of a new approach to distinguishing phases with bound and unbound vortices