Experimental observation of two-stage melting in a classical two-dimensional screened Coulomb system

C. A. Murray, D. H. Van Winkle

Research output: Contribution to journalArticlepeer-review

375 Scopus citations

Abstract

We have observed a two-stage melting transition in a two-dimensional (2D) colloidal suspension of highly charged, submicron-sized spheres in water using optical microscopy and digital imaging. Our system is confined between two flat glass plates, has a lateral extent of at least 1000 spheres, and has equilibrated for over 105 time steps. Direct observation of topological defects and computed correlation functions from real-space images gives insight into the nature of the 2D melting process.

Original languageEnglish (US)
Pages (from-to)1200-1203
Number of pages4
JournalPhysical review letters
Volume58
Issue number12
DOIs
StatePublished - 1987
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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