Phys. Rev. Lett. 85, 3656–3659 (2000)Dynamic Criteria for Melting in Two DimensionsReceived 5 July 2000; published in the issue dated 23 October 2000 The two-dimensional (2D) melting transition is analyzed on the basis of the long-time behavior of a modified Lindemann parameter in 2D γL(t) and the bond-angular correlation function g6(t). Using video microscopy complete positional data are obtained over five decades in time for an ensemble of superparamagnetic colloidal particles confined to an air-water interface. We find that each of the three phases (solid/hexatic/isotropic liquid) is uniquely characterized by the long-time behavior of γL(t), g6(t), and the non-Gaussian parameter of the relative neighbor-neighbor displacement. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.3656
DOI:
10.1103/PhysRevLett.85.3656
PACS:
64.70.Dv, 61.72.Lk, 82.70.Dd
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