Time-Dependent Charge Distributions: The Generalized Dielectric Function $$\varepsilon \left( {\vec{q},\omega } \right)$$

1999 ◽  
pp. 102-149
Author(s):  
Jean-Noël Chazalviel
Keyword(s):  
Dielectric Function ◽  
Time Dependent ◽  
Charge Distributions

On the Cherenkov radiation from extended charge distributions

2000 ◽  
Vol 77 (10) ◽  
pp. 775-784 ◽  
Author(s):  
M Villavicencio ◽  
J L Jiménez ◽  
JAE Roa-Neri
Keyword(s):  
Explicit Expression ◽  
Charge Distribution ◽  
Constant Velocity ◽  
Cherenkov Radiation ◽  
Poynting Vector ◽  
Time Dependent ◽  
Spherically Symmetric ◽  
Charge Distributions ◽  
Extended Charge ◽  
A Charge

In this work the Cherenkov effect for extended charge distributions is analyzed using two different methods. In the first method, the Poynting vector is employed to determine the energy radiated, whereas in the second one, we apply the idea of generating time-dependent elemental dipoles, induced by a charge distribution moving with constant velocity, inside a material medium. An explicit expression for the Cherenkov radiation generated by some different kinds of spherically symmetric charge, travelling inside a medium, is obtained.PACS Nos.: 03.50.De, 41.20.Bt, 41.60.-m, 41.60.Bq

Time-dependent Hartree-Fock formalism for the dielectric function

1979 ◽  
Vol 19 (4) ◽  
pp. 1720-1726 ◽  
Author(s):  
N. E. Brener ◽  
J. L. Fry
Keyword(s):  
Dielectric Function ◽  
Time Dependent ◽  
Hartree Fock

Time-Dependent, Optically Controlled Dielectric Function

2015 ◽  
Vol 6 (3) ◽  
pp. 320-325 ◽  
Author(s):  
Maxim Artamonov ◽  
Tamar Seideman
Keyword(s):  
Dielectric Function ◽  
Time Dependent

scholarly journals Dielectric function for free electron gas: comparison between Drude and Lindhard models

2016 ◽  
Vol 39 (2) ◽  
Author(s):  
A. V. Andrade-Neto
Keyword(s):  
Dielectric Function ◽  
Electron Gas ◽  
Time Dependent ◽  
Complex Conductivity ◽  
Complex Dielectric Function ◽  
Doped Semiconductors ◽  
Conduction Electrons ◽  
Heavily Doped ◽  
Function Models ◽  
External Time

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.

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