Tunable Order of Helically Confined Charges
arXiv:2003.08698 · doi:10.1103/PhysRevE.102.012147
Abstract
We investigate a system of equally charged Coulomb-interacting particles confined to a toroidal helix in the presence of an external electric field. Due to the confinement, the particles experience an effective interaction that oscillates with the particle distance and allows for the existence of stable bound states, despite the purely repulsive character of the Coulomb interaction. We design an order parameter to classify these bound states and use it to identify a structural crossover of the particle order, occurring when the electric field strength is varied. Amorphous particle configurations for a vanishing electric field and crystalline order in the regime of a strong electric field are observed. We study the impact of parameter variations on the particle order and conclude that the crossover occurs for a wide range of parameter values and even holds for different helical systems.
arXiv comment10 pages, 6 figures
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Cited by in corpus (4)
- External field-induced dynamics of a charged particle on a closed helix
- Driven toroidal helix as a generalization of Kapitzas pendulum
- Formation and crossover of multiple helical dipole chains
- Long-Range Interacting Particles on a Helix: A Statistical and Correlation Analysis of Equilibrium Configurations