Volume 86, Number 6, June 2009
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||09 July 2009|
Structural and dynamical heterogeneities in two-dimensional melting
Department of Physics, Kyoto University - Kyoto 606-8502, Japan
Corresponding author: email@example.com
Accepted: 2 June 2009
Using molecular-dynamics simulation, we study structural and dynamical heterogeneities at melting in two-dimensional one-component systems with 36000 particles. Between crystal and liquid we find intermediate hexatic states, where the density fluctuations are enhanced at small wave number k as well as those of the sixfold orientational order parameter. Their structure factors both grow up to the smallest wave number equal to the inverse system length. The intermediate scattering function of the density is found to relax exponentially with decay rate with z ~ 2.6 at small k in the hexatic phase.
PACS: 64.70.D- – Solid-liquid transitions / 61.72.J- – Point defects and defect clusters / 83.10.Rs – Computer simulation of molecular and particle dynamics
© EPLA, 2009
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