J. Phys. IV France 10 (2000) Pr5-447-Pr5-450
Dynamics of the 2D two-component plasma near the Kosterlitz-Thouless transitionD. Bormann1, H. Beck2, O. Gallus2 and M. Capezzali3
1 Universität Augsburg, Theoretische Physik II, Universitätsstr. 1, 86159 Augsburg, Germany
2 Université de Neuchâtel, Institut de Physique, 1 rue A.-L. Breguet, 2000 Neuchâtel, Switzerland
3 Queens University, Department of Physics, Stirling Hall, Kingston, ON, Canada
We study the dynamics of a classical, two-component plasma in two dimensions, in the vicinity of the Kosterlitz-Thouless (KT) transition where the system passes from a dielectric low-temperature phase (consisting of bound pairs) to a conducting phase. We use two "complementary" analytical approaches and compare to simulations. The conventional, "intuitive" approach is built on the KT picture of independently relaxing, bound pairs. A more forma1 approach, working with Mori projected dynamic correlation functions, avoids to assume the pair picture from the start. We discuss successes and failures of both approaches, and suggest a way to combine the advantages of both.
© EDP Sciences 2000