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Cage correlation and diffusion in strongly coupled three-dimensional Yukawa systems in magnetic fields
K N Dzhumagulova1, R U Masheyeva1, T Ott2
1IETP, Al Farabi Kazakh National University, 71, al Farabi Avenue, Almaty, 050040, Kazakhstan.
Physical Review. E
|July 15, 2016
Summary
External magnetic fields enhance particle localization in Yukawa systems. This magnetic field effect leads to anisotropic particle migration and altered diffusion, impacting material properties.
Area of Science:
- Condensed Matter Physics
- Computational Physics
Background:
- Yukawa systems model interactions in plasmas and colloids.
- Particle localization is crucial for understanding material properties.
Purpose of the Study:
- Investigate the effect of external magnetic fields on particle quasilocalization.
- Quantify particle migration anisotropy and its relation to diffusion.
Main Methods:
- Molecular dynamics simulations were employed.
- System parameters included coupling strength, screening strength, and magnetic field strength.
- Cage correlation functions and directional correlation functions were analyzed.
Main Results:
- External magnetic fields significantly enhance particle caging times.
- Particle migration becomes anisotropic, with increased localization perpendicular to the magnetic field.
- Diffusion coefficients derived from directional correlation functions align with mean-squared displacement calculations.
Conclusions:
- Magnetic fields promote particle quasilocalization in Yukawa systems.
- Anisotropic diffusion is a key consequence of magnetic field influence.
- The study provides a quantitative link between particle localization and diffusion dynamics.
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