Dielectric function for free electron gas: comparison between Drude and Lindhard models
| Autor: | A.V. Andrade-Neto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Free electron model
General Physics and Astronomy função dielétrica 02 engineering and technology Electron Lindhard model 01 natural sciences Education Electric field 0103 physical sciences Wave vector dielectric function 010302 applied physics Physics modelo de Lindhard Drude model Condensed matter physics business.industry 021001 nanoscience & nanotechnology Thermal conduction lcsh:QC1-999 Semiconductor 0210 nano-technology Fermi gas business modelo de Drude lcsh:Physics |
| Zdroj: | Revista Brasileira de Ensino de Física v.39 n.2 2017 Revista Brasileira de Ensino de Física Sociedade Brasileira de Física (SBF) instacron:SBF Revista Brasileira de Ensino de Física, Vol 39, Iss 2 |
| Popis: | The interaction between light and metals or heavily doped semiconductors is largely determined by their free conduction electrons. The frequency and wave vector dependent complex dielectric function is an essential ingredient of the description of its optical and transport properties. The aim of this paper is to give a didactic introduction how the conduction electrons in solids responds to an external time dependent electric field and to make a comparison between Drude and Lindhard dielectric function models for the electron gas. In within framework of Lindhard model we derived an expression for dielectric function that is similar to the familiar Drudes's formula. In particular, the differences and similarities between the complex conductivity obtained from the two models are analyzed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|