• Corpus ID: 244527511

Stopping power of electrons in a semiconductor channel for swift point charges

@inproceedings{Nagy2021StoppingPO,
  title={Stopping power of electrons in a semiconductor channel for swift point charges},
  author={I. Nagy and I. Aldazabal},
  year={2021}
}

• I. Nagy, I. Aldazabal
• Published 24 November 2021
• Physics

The nonperturbative kinetic framework for the stopping power of a charged-particle system for swift point projectiles is implemented. The pair-interaction potential energy required in this framework to two-body elastic scattering is based on the screened interaction energy between system particles. In such an energetically optimized modeling the swift bare projectile interacts with independent screened constituents of a fixed-density interacting many-body target. The first-order Born momentum-transfer (transport) cross section is calculated and thus a comparison with stopping data obtained [Phys. Rev. B 26, 2335 (1982)] by swift ions, Z1 ∈ [9, 17] and (v/v0) ≃ 11, under channeling condition in Si is made. A quantitative agreement between the elastic scattering-based theoretical stopping and the experimentally observed reduced magnitude is found. Conventionally, such a reduced magnitude for the observable is interpreted, applying an equipartition rule, as inelastic energy loss mediated by a collective classical plasma-mode without momentum transfer to the valence-part. Beyond the leading, i.e., first-order Born-Bethe term (Z 1 ), the Barkas (Z 3 1 ) and Bloch (Z 1 ) terms are discussed, following the arguments of Lindhard for screened interaction. An extension to the case of stopping of warm dense plasma for swift charges is outlined as well.