Stopping force on point charges in cylindrical wires

A. A. ALIGIA, J. L. GERVASONI, AND N. R. ARISTA

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

APS

Año: 2004 vol. 70 p. 1 - 5

0163-1829

page 235331 We calculate the stopping force of charged particles traveling parallel to the axis of a cylindrical wire due to collective excitations. We used a recently developed formalism, based on a semiclassical dielectric function and the interaction of the particle with bulk and surface collective modes. The equivalence of both classical and quantum-mechanical results is demonstrated. The different contributions to the stopping force are discussed in detail on the basis of analytical and numerical results. We propose a simple way to handle the divergences due to excitations of some bulk modes.