Slow heavy dimers in a two-dimensional degenerate electron gas: Calculation of orientation-dependent retarding forces

Abstract

We present a theoretical study on the orientation-dependent retarding force experienced by slow dimers moving at arbitrary alignment with the direction of their velocity in a two dimensional degenerate electron gas. The influence of the individual constituents of a dimer on independent electrons is modeled by effective, s-type phase shifts . Analytical results are derived by considering the effects of interference and multiple scattering.The orientation-dependent expressions reveal the dependence of stopping power on the classical geometry and these effects of quantum dynamics. A brief account on strongly related problems of resistivity caused by imperfections in the many-body system and pure dephasing of elastically scattered electrons is made, as well.The physically motivated case of ͑k F ͒ = Ϯ ͑ / 2͒ for the leading phase shift is explicitly discussed.

Orientation-dependent retarding force of a three-dimensional degenerate electron gas for slow homonuclear trimers

“…Based on stationary scattering methods, currently we are working on the two-dimensional (2D) extension of the underlying [21] framework for in-plane chains of atoms as well. The controllable depositions and orientation manipulations of multicenters on close-packed noble metal surfaces represent a direct and real challenge of broad technological relevance.…”