Equilibrium properties and phase diagram of two-dimensional Yukawa systems

Journal Article · Mon Aug 01 04:00:00 EDT 2005 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.72.026409· OSTI ID:20706331

Hartmann, P; Donko, Z; Kutasi, K ^[1]; Kalman, G J ^[2]

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1. Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 49 (Hungary)
2. Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States)

Properties of two-dimensional strongly coupled Yukawa systems are explored through molecular dynamics simulations. An effective coupling coefficient {gamma}{sup *} for the liquid phase is introduced on the basis of the constancy of the first peak amplitude of the pair-correlation functions. Thermodynamic quantities are calculated from the pair-correlation function. The solid-liquid transition of the system is investigated through the analysis of the bond-angular order parameter. The static structure function satisfies consistency relation, attesting to the reliability of the computational method. The response is shown to be governed by the correlational part of the inverse compressibility. An analysis of the velocity autocorrelation demonstrates that this latter also exhibits a universal behavior.

• OSTI ID: 20706331
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics Journal Issue: 2 Vol. 72; ISSN PLEEE8; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPRESSIBILITY
CORRELATION FUNCTIONS
EQUILIBRIUM
LIQUIDS
MOLECULAR DYNAMICS METHOD
ORDER PARAMETERS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
SIMULATION
SOLIDS
STRUCTURE FUNCTIONS
TWO-DIMENSIONAL CALCULATIONS