Orientation-dependent stopping power of a degenerate electron gas for slow homonuclear dimers

I. Nagy and I. Aldazabal
Phys. Rev. A 81, 052901 – Published 7 May 2010

Abstract

We present a theoretical study on the orientation-dependent retarding force experienced by slow homonuclear dimers moving at arbitrary alignment with the direction of their flight in a three-dimensional degenerate electron gas of metallic densities. The analytical results are derived within the approximate framework of Brueckner for elastic scattering of an electron by a system of two auxiliary potentials of short range. The influence of the screened field of a single constituent of the slowly moving composite projectile on the scattering electron is modeled by an effective phase shift parameter η in the short-range potential in order to characterize the real-constituent system coupling due to displacement. The orientation-dependent closed expressions reveal the dependence of observables on the classical geometry and quantum dynamics. The interplay of wave-interference and multiple scattering in the orientation-dependent friction is analyzed for realistic sets of the input parameters. Comparison with experimental data is made and good agreement is found.

  • Figure
  • Received 28 January 2010

DOI:https://doi.org/10.1103/PhysRevA.81.052901

©2010 American Physical Society

Authors & Affiliations

I. Nagy1,2 and I. Aldazabal2,3

  • 1Department of Theoretical Physics, Institute of Physics, Technical University of Budapest, H-1521 Budapest, Hungary
  • 2Donostia International Physics Center DIPC, P. Manuel de Lardizabal 4, E-20018 San Sebastián, Spain
  • 3Centro de Física de Materiales (CSIC-UPV/EHU) - MPC, P. Manuel de Lardizabal 3, E-20018 San Sebastián, Spain

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Issue

Vol. 81, Iss. 5 — May 2010

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