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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
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A new model dielectric function for loss functions and electron damping.

Eric L Shirley1

  • 1Sensor Science Division, National Institute of Standards and Technology, 100 Bureau Drive, MS 8441, Gaithersburg, MD 20899-8441, USA.

Radiation Physics and Chemistry (Oxford, England : 1993)
|August 19, 2021
PubMed
Summary
This summary is machine-generated.

This study analyzes the dielectric function

Keywords:
Dielectric functionLifetime dampingLoss functionSelf-energySum rule

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Area of Science:

  • Solid-state physics
  • Materials science

Background:

  • The dielectric function describes how a material responds to an electric field.
  • Understanding its frequency moments is crucial for predicting material properties.

Purpose of the Study:

  • To investigate trends in the zeroth frequency moment of the imaginary part of the dielectric function.
  • To develop a model dielectric function using moment information.

Main Methods:

  • Analysis of the zeroth frequency moment for various materials (metals, semiconductors, insulators).
  • Incorporation of inverse-first and first moments (via Kramers-Kronig relations and f-sum rule).
  • Construction of a model dielectric function.

Main Results:

  • A model dielectric function was constructed by matching three key moments.
  • The model reasonably predicts the loss function, accounting for momentum and damping effects.
  • Model predictions align with first-principles calculations.

Conclusions:

  • Matching dielectric function moments provides a robust method for predicting material behavior.
  • The developed model effectively captures electron state dynamics and damping effects.