Time-Dependent Density-Functional Theory for the Stopping Power of an Interacting Electron Gas for Slow Ions

Details Time-Dependent Density-Functional Theory for the Stopping Power of an Interacting Electron Gas for Slow Ions Time-Dependent Density-Functional Theory for the Stopping Power of an Interacting Electron Gas for Slow Ions

2005-02-19

arxiv.org/abs/cond-mat/0502479v1

Phys. Rev. B 71, 121106(R) (2005).

Physics

Condensed Matter

Materials Science

4 pages, 1 figure, Accepted to Phys. Rev. B (Rapid Communication)

Scientific paper

10.1103/PhysRevB.71.121106

Based on the time-dependent density-functional theory, we have derived a rigorous formula for the stopping power of an {\it interacting} electron gas for ions in the limit of low projectile velocities. If dynamical correlation between electrons is not taken into account, this formula recovers the corresponding stopping power of {\it noninteracting} electrons in an effective Kohn-Sham potential. The correlation effect, specifically the excitonic one in electron-hole pair excitations, however, is found to considerably enhance the stopping power for intermediately charged ions, bringing our theory into good agreement with experiment.

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