Equilibrium properties and phase diagram of two-dimensional Yukawa systems

2005/08/22 by Péter Hartmann, G. Kalman, Zoltán Donkó +1 · 6 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Dust and Plasma Wave Phenomena #Quantum, superfluid, helium dynamics

paper · doi:10.1103/physreve.72.026409

openalex publication_date 2005/08/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

Properties of two-dimensional strongly coupled Yukawa systems are explored through molecular dynamics simulations. An effective coupling coefficient gamma* 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.

Citations

• Asymptotic decay of pair correlations in a Yukawa fluid
• Ordering, metastability and phase transitions in two-dimensional systems

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• Gabor Kalman [wikipedia]