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Hieu T Nguyen-Truong1,2

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We calculated electron inelastic mean free paths (IMFPs) for 10 elemental solids below 100 eV. Our results for hot-electron inelastic lifetimes offer a valuable alternative for spectroscopy and microscopy.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Surface Science

Background:

  • Accurate knowledge of electron inelastic mean free paths (IMFPs) is crucial for interpreting data from electron spectroscopy and microscopy.
  • Existing methods for calculating IMFPs can be computationally intensive or limited in applicability.

Purpose of the Study:

  • To determine the IMFPs for 10 elemental solids at low electron energies (< 100 eV).
  • To provide an alternative computational approach for evaluating hot-electron inelastic lifetimes.

Main Methods:

  • Utilized the dielectric formalism to calculate energy-loss functions.
  • Employed the adiabatic local-density approximation within time-dependent density-functional theory.
  • Calculated IMFPs for V, Fe, Ni, Mo, Pd, Ag, Ta, W, Pt, and Au.

Main Results:

  • Determined IMFPs for 10 elemental solids below 100 eV.
  • IMFPs calculated a few eV above the Fermi energy show good agreement with ab initio GW approximation results.
  • The dielectric formalism approach provides reliable IMFP values.

Conclusions:

  • The dielectric formalism, using TDDFT, offers a viable method for calculating low-energy IMFPs.
  • This approach provides a valuable alternative for assessing hot-electron inelastic lifetimes in materials.
  • The findings support the application of these calculations in electron spectroscopy and microscopy.